Abyssal Dredge
About
The floor of the abyss given ambulatory form - heavy, slow, and patient in the way geology is patient. It senses vibration through ground and deep water, and it does not experience pain.
Stats
Save Rolls
Traits

Special Attack
Crushing Appendage: bludgeoning, +7 to hit, 2d10+6 bludgeoning and acid (two strikes). Acid Wave: once per 4 rounds, save Dex Quick (TN 14) for half, 3d8 acid; struck non-magical armor loses 1 DR for the rest of the encounter.
Special Defense
Abyssal Constitution: the first time it drops to 0 hit points it makes a Con Tough save (TN 10) - on a success it surges back to 40 hit points and gains +2 to all attack rolls for 3 rounds (once per encounter). Resists fire and poison; immune to charm and fear. Senses: Night Vision (120 ft).