Rapturous, Slime Keeper.

You must have cut your way through a thousand pink slimy beasts throughout the dark stretches of the catacombs. Relatively weak creatures, once the crystal binding their bony and jellied form is shattered, they melt to pieces. Draining away to locales unknown deeper in the twisted shade, your curiosity as to their origin has led you on a dark quest. A befouled cackling met your ears long before your eyes met its hollow gaze, for it had known you were coming for quite some time. Each magenta ilk you had dispatched were merely extensions of the slime keeper, Rapturous, all draining back to their joyful host. Making one final turn you step out into a dimly lit clearing, where before you stands something foul. The entrance seals behind you with a slapping, stretching glop as where once was tunnel, now is but a pink wall. The cavern shudders with the laughter of the colossal tower of slime and bone, as you are faced with the lord of all slime, bringer of joyous decay.