Gray Ooze

Oozes thrive in the dark, shunning areas of bright light and extreme temperatures. They flow through the damp underground, feeding on any creatures or object that can be dissolved, slinking along the ground, dripping from walls and ceilings, spreading across the edges of underground pools, and squeezing through cracks. The first warning an adventurer receives of an ooze's presence is often the searing pain of its acidic touch.
A Gray Ooze is stone turned to liquid by chaos. When it moves, it slithers like a liquid snake, rising to strike.