Pinkymod/Eldritch Sludge

The Eldritch Sludge is a Hardmode found within. It slowly moves towards the player to deal contact damage, gaining speed as it loses health and does a flip whenever it jumps.

Bestiary Entry
An actual pile of Abyss - the most simple lifeform that the dark void has spewed forth. It is still something to reckon with in it's own way. While it might not be very good at hitting things, it sure can tank hits itself. Don't let them clog up the dungeon floor and you should be fine.

Apparently, they actually managed to haul one up from the Dungeon, and had it shipped all the way to Hallowstone for research. The scientists scratched their heads at it, as it bubbled and blasphem'ed in it's tank. The mages, they were genuinely terrified, for it emanated a darkness that they could feel but not explain. Something they thought was beyond their reach. But alas! It was only because they thought too deeply, and forgot to sit back and just perceive these sludges as a normal person would. Only then, would their true nature reveal itself. One of pain, suffering and a yearning for something lost. The nature of the Abyss.