(Making a new thread since steam account)
Before you go "too many bosses" I'm going to say I'm only suggesting these. I'm not asking for ALL of them to be added, but simply looked at. If even one is added I'll be happy.

Tier 1-
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Guardian Annie-
Appearance: A larger, more elaborate, Wing series. Fiend Type.

Stage Design: A very lively forest, very elaborate and abstract. Much like in the movie avatar.

Boss Stage: A spring with trees around the area

Battle-
She constantly spawns enemies, who are constantly healing when in her radius (which is large). Her natural healing auras and the auras of other wings cannot heal her. Once at a certain health she'll start going into final stand, in which case she'll go into a bubble that can break if you hit it enough, and within it she'll start healing.
A simple attack her down boss, much like king jelly but easier.

Attacks:

• Heal Aura -Normal heal wings do, but larger radius.
• Heal Burst -Blows away a wind, knocking you back and healing all within the vicinity.
• Bubble of safety -Creates a large defender bubble which health all within it, and increases deference of all within it. Although, she can't move when doing this.
• Assistance from children -Spawns actual wing series to help in healing your foes.
• Final stand -Puts herself in a small bubble, only the size of her, which can absorb a good amount of damage before breaking. She heals at a decent pace when inside of it.

Token- Life Seed: A seed found within the forest guarded by Annie. They say this seed can be fed to a person near death, and give them enough strength to live on; however, it doesn't seem to cure any of the wounds, and because of this its power is only known as temporary.

Tier 2-
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Devouring Veinlisk-

Appearance: A Sandworm Beast Type.

Stage Design-
Stage 1: Plains leading into a Desert
Stage 2: Desert leading to an Oasis
Boss stage: An Oasis. Rocks surround the area.

Battle:
The Sandworm goes underground, and pops out of the ground and goes back under, then digs along the sand quickly trying to hit you. All the meanwhile Chromalisk and larger Rock jellys are spawning to attack.

If the sandworm hits a chromalisk in his attacks he kills it, but regains a small portion of health.

Stage 1: When he pops out of the ground to come back down and dig, you need to stand near a rock jelly because, when he comes back down, he'll hit the rock jelly, kill it, and be knocked dizzy. While he's dizzy you can attack him, but after about 4 seconds he comes back to his senses and goes back the way he was going.

Stage 1 Attacks-

• Lunge - Jumps out of the ground, and slams back down somewhere else
• Dig - Swims like a shark fin, except with his mouth, hitting all of those in his path.
• Rage -Digs straight out, half of his body still in the sand, and starts spitting out balls of sand (Chromalisk spit, but it does stun). Then right when he finishes he whips his entire body in a 360 degree angle and digs right back down.

Stage 2: Once he hits half health he moves faster, takes more then 1 jelly to knock him out, and does more attacks.

Stage 2 Attacks:

Token- Spice Granule: a fantastic brain-boosting substance that is said to give you psionic abilities. It also makes a great coffee. (Credit to Mejezfeld for the token)

Tier 3-
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Baneslaig, The corrupter- (This boss would be completely resistant to all elemental ailments) Undead Type.
Appearance: Same color as normal phantoms, but look more like a person in cobalt armor with a Ironmight plate and a flaring red scarf, and his sword would be a black and red flaming Cold Iron Vanquisher.

Stage design:-
Stage 1: A decrepit undead forest with fog and black as coal trees.

Stage 2: Fusing that undead forest with a cemetery.

Stage 3: Entering a broken down and corrupted church.

Stage 4: Boss stage- The main area of the church, with chairs on all sides and a long hallway forward until you reach an organ, but at the organ there would be a Blue female spirit chained up with her head dangling, showing she's unconscious. She would be enveloped by a crystal of sorts, to make sure you can't reach her. Around the stage there would be various little water balls of which to throw around.

In the first stage you'd activate this water system, and then you'd have to throw a vial into it, to make all the water turn all white and it would glow, lighting up the path on ahead. These balls of water would be used often to progress through the stage.

(Sure, Vanaduke has water, but I just like the idea of holy water.)

Battle:
Stage 1 initiation- As you walk up he'd be standing there, with his sword in the ground, his scarf whipping in the wind as he vanishes into a ball with a small chuckle. His sword would be left there in the ground.

Stage 1 Battle: Simply shimmers as he walks toward you, nothing you can do can hurt him. Not even water since it would pass right through him. Until he gets close enough to where he prepares an attack. He'd swing no different then a 3 swing combo from a sword with set-up time before hand to give you an opening to hit him with water. Once hit, he would fall on one knee and sit there with the shimmer around him gone completely. If you do not out damage him enough to make him enter stage 2 he would simply turn into a ball and run away for a sec before he comes back and does it again.

Stage 1 Attacks:

• Shimmer step- Invincible until close to attacking.
• Phantom claw- Slashes with his hand, almost like using claws, for a 3 strike combo. Its range would be pretty big, and it would have a fair chance to inflict strong curse.

Stage 2 Initiation- Teleports away as you hear him growl. He would teleport right behind his sword, and pick take it out from the ground. He would then walk towards the center of the stage, still unable to take damage, as he then begins to charge. He would even give a glow, much like our knights, to give a warning to say "This isn't going to be good if you're close". He would then initiate a spin attack, just like any levi/CIV attack but it would explode around him with curse, and then also it would send 8 Gran faust swords in all directions like "->|<-". After that he'd begin to attack you.

Stage 2 Battle- Just like Stage 1, except now he's fighting with a harder to predict Ai, stronger attacks, and etc. Just an overall increase in power.

Stage 2 Attacks:

• Shimmer step- Invincible until close to attacking.
• Phantom slash- Slashes his sword 3 times, lunging forward a good distance, with a wave of energy following it for a short distance. The slash has a fair chance to inflict curse, while the waves have a slight.
• Phantom dash- Teleports toward you constantly in a jagged pattern, getting closer and closer every time, and within almost a second or two (depending on distance) he'd be right in front of you preparing his combo.
• Corrupted Charge- Charges his sword in place for 1.5 seconds, glows for 0.5 seconds, and releases to initiate that charge attack again.
• Resistance from Purity- He would have a slight aura around him at all times, blocking 1 water before he's vulnerable. If he's not knocked down after 5-10 seconds, he gets it back.

Stage 3 Initiation- Shakes his head as he's on one knee. The crystal that covered the girl would now crumble and break quietly. He breathes heavy for a second, almost surprised at what just happened. It's been so long since he has ever felt pain. He would get up, slowly, and roar. As he does 2x the amount of players in phantoms would start ripping from the ground. They would all be wearing spiral gear, and then he would gain a shroud like cloak with a presence behind him. It would almost look like the shroud behind him would create an image, which would look almost like a distorted face ripping forward roaring.

As this goes on the girl in the back would begin to wake, and then she'd blink twice, with shock in her eyes, as she closes it and screams "Help!" There would be no audio, but it would be like what happens if you typed /help. The phantom would quickly turn his torso in her direction to stare at her as he raises one hand and thrusts it in her direction. She would then, too, be enveloped by a shroud, which makes it to where you can't reach her.

Stage 3 Battle- The boss would now fight more like a construct shield robot fused with a phantom, and the spiral armored phantoms would fight just like phantoms. He would now imitate a charge attack that spins, much like the FoV's fire, but would initiate curse on you if you're hit. Once you hit him with water the shroud around the girl would leave, and the around him would thicken. If you try to hit him, all you would hear is if you hit an un-breakable object (tink tink), but as soon as the shroud leaves the girl she would do the /help again. You have to go to her and attack her. By doing so, you're breaking her chains. If you can't break the chains a bomb-symbol appears on the ground (think if a person uses a bomb in pvp, and how it's red). You either get out, or guard, and when it detonates she has a shroud again and the process must be repeated until you break her out.

Stage 3 Attacks:

Stage 4 Initiation-The girl would break out as the Baneslaig would fly to the middle. She would stare at him, and tackle him. When done, you would see a corrupt mist explode out of the cobalt armored guy, and he would be left there. This will show him being possessed, and not doing this of his own will. The girl would shake him to wake up, and he would get up slowly, very weak, holding his head on one hand with his sword on the ground.
The entire stage would darken, and the girl would back away, towards the guy, scared as he would give a serious look. The guy would then shout "Fall back" as he puts up a bubble (defenders, maybe bigger), as the entire stage would get ripped away by a red spiraling mist. If you're in the mist, you will take massive damage with a 100% rate of having high curse on you. Now the entire stage would look red and spiraling, almost like as if you're standing on top of an invisible ground looking at the ground below to the background, and it's from here that face-like image would appear roaring. The guy would then fall on one knee in exhaustion, and the face would start flying forward slowly. As it does the girl would then conjure a ball of water (picking it up without having anything there) and throw it at him. The face would roar, slightly in pain, and move back. Then she'd begin channeling as the red-distorted mist-like face would come closer.

Stage 4 Battle- As the battle goes on the girl would become brighter and brighter and brighter, and as this happens the face in the back would start to become closer, slowly, and as shown by the girl you need to throw water at him to make him fly back. As he gets closer he would also be firing bullets that have a decent chance to curse, and while this happens a couple more phantoms would come in. This would become an endurance round. You need to beat the phantoms (which actually makes them flee so they don't re-spawn in place) while throwing water at this bullet hell creating face. It can only get so close, but the closer it is the faster it fires and the less time you have to react to his bullets (because he's closer, dur). At random certain intervals he'd do the mist attack again, in which case the guy would say "fall back" again, get up, shield, and rest again when it's over. Except, this time, when it happens there will be phantoms. As time goes on he'd spawn more and more phantoms, and if the phantoms hit the girl it takes longer because she's losing focus. Every time she's hit it adds another 10 or 15, or maybe even 20 seconds to the clock you have to wait. (Maximum is 3 or 4 minutes of waiting, because that's how long it takes to charge from 0 to full). This is to prevent dying, waiting, and res right when victory, and to add more of a challenge instead of only letting yourself survive. Although, only the phantoms can hit the girl, not the bullets being shot at you. Those just make it harder to protect her.

Stage 4 Attacks:

• Corrupt proliferation - Random spots would start glowing red, then bursting.
• Dread Rain - Pillars of red would start beaming down from the sky, exploding as they hit. Of course, they would give a warning before hand. Perhaps a bomb symbol.
• Bullet Rain - The constant barrage of bullets he does.
• Spreading Corruption - The summoning of more and more phantoms as he spits out orbs over time to create more and more phantoms. Their rate of being spit out is faster as time goes on.
• Void Corruption -The cursed eye would appear in an area for about about 2-3 seconds, and then it would make a red and black graviton bomb. It would be a tad larger then gravton though, with as much suction as the t5 vortex.
• Black Wind - The ultimate attack he does which you have to be within the defender shield to survive.

(His bullets have a slight chance to curse, Dread Rain and Void corruption would have a fair chance, Corrupt proliferation would a good chance, and Black wind would be 100%)

Battle End: After she fully charges a pillar of light would appear shooting down on her, and then the boss would roar, making the light around the pillar dim until it fades. After he destroys the pillar she would pass out, and the cobalt armored guy would get up, grabbing his sword, and he'd thrust it into the air making a pillar 3 times larger then hers, and the entire stage would go white. When everything fades the ground would look normal, the spirit of the girl would still be there knocked out (by knocked out it would simply be like when you die, except with the eyes closed), and the guy would pass out beside her as the boss coin comes down.

Token- Rosary Bead: An ancient bead used by a knight back during one of the fable crusades. They said that the bead once held an ancient power, but now it's only found in pieces. It makes a good treasure though.

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Gritexal the Enlightened

Appearance: A knight in a robe, and behind him would be this this corrupt slime mesh boss. The slime mesh would have a bunch of nuclei made of this noxious green, and the slime itself is a lavender and purple with spikes everywhere, and tubes would be ejecting out of the slime lord.

Special enemies:
Violent Slimes: Part of the corruption. They coagulate and fuse together, like normal, but they would also become really tense. This tenseness causes their defenses to be higher then most slimes, but what they don't realize is tensing their bodies so much that their bodies so much that their defenses in pinpoint spots became weaker. Therefore these slimes are weak to piercing, and they also have another trait which shows up on the next enemy.
Cult Followers: The enemies would be knights. Average spiral knight knights wearing average spiral knight sets. Every person would have their own resistance and the like. A person in skolver is strong to pierce, weak to shadow. A Person in vog is strong to elemental, weak to piercing. The line goes down. If a knight dies, they sit there for 5-6 seconds before they actually die, and in this time limit if there's any slimes nearby they will rush toward them, faster then usual, and if they touch them they fuse with them. This would revive the knight, and infect him, causing him to have a bit of goop on his body and a bit of tenticles / spikes. This would give him an overall health increase compared to their state before, and regardless of what armor they have they'd now be weak to piercing, just like slimes were.

Stage design:-
Stage1: A city, where in the beginning, there would be a city of goblins that don't want to hurt you. They'd ask you to help them out if you talk to them, and how the city is becoming overrun by this violent slime outbreak of corruption due to bio-engineering. They tell you the only way to stop it is to stop the cult assisting it. As you go through the stage it would get worse and worse, more corrupt and more destroyed, until you get the end which is the entrance to the factory.
Stage2: The entrance to the factory, but the ground and walls have festering pulsing slime's and tentacles.
Stage3: Deeper within the factory, the slime corruption is getting worse.
Stage4: Even deeper, the entire place almost seems like an organic compound
Boss Stage: A walkway to this Gremlin with a cloak around his back, and a bunch of wing series almost looking like doves around him. The slime thing is meshed up against the wall with tubes coming out of it, pulsating like a heart.

Battle:
Stage 1 Initiation:Gritexal is there, with a wing series on his finger and a couple surrounding him, as he's have a line to say, and then he'd summon a couple of his followers and then begin his assault on you.

Stage 1: Gritexal starts to summon a couple of his followers to his aid, and begins floating about. He would act like a mender, and would be hard to catch. He would also rain down lightning bolts from the sky.

Stage 1 attacks:

• Lightning- Summons a bolt of lightning in an area
• Heal- Heals an ally
• Resolve- Increase the attack of those around him, and if any of his allyies die near when he turns on his resolve attack they revive.

Stage 2 Initiation:He's cripple over, float over to the slime thing behind him, and look like he's praying to it. It would stab him with its tentacles as he's begin to get some goop on him, and then he'd turn around and attack.

Stage 2 Battle: Same as before, but with more attacks, more spawning, and he now summons some slimes into the battle as well.

Stage 2 Attacks:

• Lightning- Summons a bolt of lightning in an area
• Heal- Heals an ally
• Resolve- Increase the attack of those around him, and if any of his allyies die near when he turns on his resolve attack they revive.
• Spew- Spits out a bit of slime into an area. Creates a circular area that stuns,
• Rupture- Shoots spikes out of the ground (A buffed Thorn roots attack from the giant lichen colony)

Stage 3 Initiation: Same as stage 2. Flys towards the slime thing, it injects him with slime, and then he'd come back with more slime coming out of him, and on him, with more spikes. Some lichen cores can be seen on certain parts of his body.

Stage 3 Battle: He then spawns 2 Giant lichen colonies of Violent slimes, along with some followers. He'd attack with more attacks

Stage 3 Attacks:

• Lightning- Summons a bolt of lightning in an area
• Heal- Heals an ally
• Resolve- Increase the attack of those around him, and if any of his allyies die near when he turns on his resolve attack they revive.
• Spew- Spits out a bit of slime into an area. Creates a circular area that stuns,
• Rupture- Shoots spikes out of the ground (A buffed Thorn roots attack from the giant lichen colony)
• Shield- Puts up a bubble to guard himself from enemy attacks
• Miasma- Leaves a noxious gas behind him that poisons.

Stage 4 Initiation: When defeated he'd limp over to the slime lord, and with his last moment, raise his hand up, and fall over. The slime would then stab him with tentacles and take his body into his own. It then breaks out and begins to attack.

Stage 4 Battle: At this point this thing would only summon already-corrupt knights, many slimes, and 3 giant lichen colonies. Instead of slowly floating though, this thing would dash about.

Stage 4 Attacks:

Battle End: The slime starts to spew out its cores, and they start falling out and exploding. It slowly shrinks as the cores from within fall out and pop, until it finally completely dies out.

Token- Corrupt Crystal: Within the depths of the corrupt city, broken off chips of the hardened violent lichen cores have somehow crystallized into a rock. The substance is extremely rough and jagged, and is seemingly unbreakable.

I'll add more as I think of them.