Evil acid

Ah yes. Slime with pumpkin face that moves his head around to sing.

Bio: Thrifx was originally a simple puddle on the ground. Then someone accidentally spilled a bunch of chemicals onto the spill. And it turned into an acid puddle the melted the mop someone tried to use to clean it. At first life continued until the puddle started to move and... ...Speak? Yes it turns out the puddle became sentient from the chemicals spill on it

Spunge

Thrifx is a reference to Official Shadow Quad's shadow

did oogiddy's floor goop fuse with pentumbra's shadow to make this monster