Ægir
Undead boss
4 star boss

Appearance: a large skeleton of a serpent with each mineral on each segment (Moonstone, valestone, crimsonite, luminite, dark matter) and a pitch black crystal in its skull

Boss room appearance: a large crystal cave slightly flooded with small dry raised grounds. An arrangement of moonstone and valestone line the edges of the caves.

Stage 1:

Attacks:
Leaps from the water below a knight to dive into another knight.
(Following attacks are variations if first attack)
Moonstone glows, sending moonstone shards to fall from the ceiling, inflicting freeze.
Valestone glows, causing valestone stalagmites to slowly rise from the water, poisoning an area around them.

After 7 attacks, crimsonite glows, boiling the water, inflicting fire and evaporating the water. Forcing ægir to lay helplessly on the dry ground, allowing you to attack its crystals 4-6 times, and if a crystal breaks, it goes to its second stage, if not, it goes back to first.

Stage 2:

Attacks:
Leaps from the water below a knight to dive into another knight
Or leaps out of a corner of the map to horizontally swim partially uncovered into a knight.
(If mineral is still available)
Moonstone glows, sending moonstone shards to fall from the sky, freezing water around it.
Valestone glows, causing valestone spikes to come out of the water, poisoning a large portion of the field.
Luminite glows, making the impact of dive or swim to explode in a large radius.
Dark matter glows, making the impact of dive or swim to implode, sucking in all knights in an area.

After 7 attacks, crimsonite glows, causing the water to boil and small crimsonite shards to fall on the dry land, causing the water to evaporate and forcing ægir to lay helplessly on the dry ground, allowing you to attack the rest of its crystals 6-9 times, and if a crystal breaks, it goes to its third stage, if not, it goes back to second.

Stage 3:

Attacks:
Leaps high from the water in the centre to land on an unsuspecting knight in a watery explosion
Or surfaces and quickly swims near a knight, then bites it.
(If mineral is still available)
Moonstone glows, sending moonstone shards to land on the dry land, freezing the water around it.
Valestone glows, causing valestone spikes to come out of the water, poisoning all the water.
Moonstone and valestone glow, causing the moonstone and valestone lining to activate, shocking the water.
Moonstone and valestone glow, causing the water to rise over the land and activating some of the moonstone and valestone lining to activate, shocking some of the water.
Darkmatter and luminite glow, causing the impact of dive to create a supernova and the bite to delay then shoot a beam forward.
Darkmatter and valestone glow, causing the cave to go pitch black, making the only visible things your eyes, target circles, and his crystals.
Luminite and moonstone glow, causing the cave to glow with blinding light, making the only visible thing the silhouette of his body.
Darkmatter and crimsonite glow, giving his attack a chance to curse.
All minerals glow, causing

After 7 attacks, crimsonite glows, causing the water to boil and large crimsonite shards to fall on the dry land, causing the water to evaporate and forcing ægir to lay helplessly on the dry ground, allowing you to attack the rest of its crystals 10-12 times, then returning to its third stage.

The third stage keeps repeating until all of the crystals are gone. Then it goes to its last stage.

Stage 4:

Appearance: a pitch black gem glows in its skull, making a ghostly form of himself surround the bones.

Attacks:
Opens his mouth while underground, making a whirlpool, sucking in knights, then biting them when they get close.
Lunging from the water, then scattering its bones, making them rain from the sky, creating crystallized skeletons. Reforms when they all die.
Chewing up minerals from the walls, then rapid fire shoots the shards at nearby knights, (moonstone inflicts freeze, valestone inflicts poison, crimsonite inflicts burn).
Surfaces, then thrashes around, slowly turning and flailing, stunning any knight that gets hit.
He is always vulnerable in his second stage except for his whirlpool and bone attack.

When a crystal is broken, you have a chance of getting 5-20 of the mineral.

Drops 3 crystalline fragments on death.
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Crystallized skeletons
Undead
Ai: zombie

Spawns in random mineral colours
Luminite: tanky but weak
Darkmatter: high damage but low hp
Valestone: high damage and hp but slow.
Moonstone: low damage and hp but very fast speed and attack speed
Crimsonite: throws shards of crimsonite.

Each one has a 10% chance to drop a mineral
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Ordinskaya
Sword 4*
Brinks: 20 crystalline fragments
Damage type: normal
Low speed
High damage

Special: troika-like sword. Charge attack slams the ground, causing crystal spikes to come out of the ground in a 120° curve in front of you.

Eitradi
Sword 5*
Alchemy: ordinskaya (+ recipe)
Damage type: normal
Low speed
High damage

Special: troika-like sword. Charge attack slams the ground, causing valestone spikes to come out of the ground in a semicircle in front of you. Good chance to inflict strong poison

Myrkur
Sword 5*
Alchemy: ordinskaya (+ recipe)
Damage type: shadow
Low speed
High damage

Special: troika-like sword. Charge attack slams the ground, causing darkmatter spikes to come out of the ground in a semicircle in front of you.

Skinandi
Sword 5*
Alchemy: ordinskaya (+ recipe)
Damage type: elemental
Low speed
High damage

Special: troika-like sword. Charge attack slams the ground, causing luminite spikes to come out of the ground in a semicircle in front of you. Good chance to inflict strong poison

Frysta
Sword 5*
Alchemy: ordinskaya (+ recipe)
Damage type: normal
Low speed
High damage

Special: troika-like sword. Charge attack slams the ground, causing moonstone spikes to come out of the ground in a semicircle in front of you. Good chance to inflict strong freeze.

Bergkvika
Sword 5*
Alchemy: ordinskaya (+ recipe)
Damage type: normal
Low speed
High damage

Special: troika-like sword. Charge attack slams the ground, causing crimsonite spikes to come out of the ground in a semicircle in front of you. Good chance to inflict strong fire
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Skjalfti
Bomb 4*
Brinks: 20 crystalline fragments
Damage type: piercing
Med charge time
High fuse time
Med damage

Special: creates crystal spikes that come out of the ground that start inward and move outwards, growing in damage the further it is from the centre.

Eldfjall
Bomb 5*
Alchemy: Skjalfti (+ recipe)
Damage type: piercing
Status effect: fire
Med charge time
High fuse time
Med damage

Special: creates crimsonite spikes that come out of the ground that start inward and move outwards, growing in damage the further it is from the centre. Good chance to inflict minor fire.

Miklihvellur
Bomb 5*
Alchemy: Skjalfti (+ recipe)
Damage type: elemental
Med charge time
High fuse time
Med damage

Special: creates luminite spikes that come out of the ground that start inward and move outwards, growing in damage the further it is from the centre.

Faraldur
Bomb 5*
Alchemy: Skjalfti (+ recipe)
Damage type: piercing
Status effect: poison
Med charge time
High fuse time
Med damage

Special: creates valestone spikes that come out of the ground that start inward and move outwards, growing in damage the further it is from the centre. Good chance to inflict minor poison.

Isold
Bomb 5*
Alchemy: Skjalfti (+ recipe)
Damage type: piercing
Status effect: freeze
Med charge time
High fuse time
Med damage

Special: creates moonstone spikes that come out of the ground that start inward and move outwards, growing in damage the further it is from the centre. Good chance to inflict minor freeze.

Ljain
Bomb 5*
Alchemy: Skjalfti (+ recipe)
Damage type: shadow
Med charge time
High fuse time
Med damage

Special: creates darkmatter spikes that come out of the ground that start inward and move outwards, growing in damage the further it is from the centre.

I made this all in a document over the span of a week, so if there are errors or things, let me know. Feedback is appreciated :D