I've seen them all. All the monsters, short of a Tortodrone, an Ironwood Sentinel, and a Giant Green Jelly. Honestly, I'm getting a bit bored of the usual garden-variety slimes, zombies, and robots. So I have a few ideas. Sure, not likely they will get implemented, but thinking about it and putting it on paper makes it less boring for me. So, without further ado, the monsters:

Constructs:

Hidden Block Bot- A construct that functions similarly to a Rock jelly, but appears in scripted locations and is common instead of a rare encounter. There is a 50% chance that they will be spawn-killed by implosion via a ghost block. However, they will still tranfer the charge to touching blocks, as to not trap you if one were to spawn. There are several different types with varying strengths:

Normal Block Bot- Apperas to be a crate, but when hit or walked to close to, will spring up and attack. (Small legs will sprout and an "eye" will open on the front. This applies to all block bots.) This block bot is weak defensively and the crate on top will break in a few hits, revealing a mechanical cube underneath. The bot will take increased damage when the crate is broken, but will move faster.

Attacks:
-will send out a weak damage pulse when first provoked.
-will tackle the player similar to a slime
-can jump into the air and smash into the ground, causing a stronger and larger damage pulse, as well as stun and knockback. If used when the crate disguise hasnt been broken yet, the crate will break on impact. If used when the crate is already broken, will inflict self damage and self-stun the bot.

Unbreakable Block Bot- Apperas to be an unbreakable block, but when hit or walked too close to, will spring up and attack. Takes reduced damage and the block on top is very hard to break. However, it moves much slower than the normal variant, but does more damage. Will move at normal speed when the block is broken.

Attacks:
-will send out a stronger damage pulse when first provoked
-will tackle the player with greater force (causes knockback)
-jump-and-ground-smash attack. However, it can use this attack several times before the box breaks. When used when the box is broken, effects are the same as the normal bot. It also causes more knockback, longer stun, and more damage than with the normal bot.

Ghost Block Bot- Appears to be a ghost block, but when hit, willl cause all touching blocks to dissapear as normal, but instead of dissapearing itslef, will spring up and attack. Deals shadow damage and moves extremely fast.

Attacks:
-will send out a moderately powerful damage pulse when first provoked
-after this it will get up and chase the player for a short time, then explode in a flurry of shadow damage. Send out 0, 4, or 8 bullets depending on Tier.

Exploding Block Bot- Functions exactly the same as a Ghost Block Bot, but moves slightly slower and does normal and elemental damage on detonation. There is also a timed variant, which will chase the player for longer before exploding and has a larger and more damaging detonation.

Thats all for the constructs, for now. I will make a second post with a different monster family.