Water-1065248 960 720
CR3 Wall of Slime - Large Ooze4, 900 souls, 2% humanityHP54 Initiative-5 Speed15(3) AC3(T3,FF3)Attack+1(2d6 acid) Abilities10,1,26,1,1 Saves+9,-4,-4SQ Transparent DC15, Paralysis FortitudeDC20, Engulf ReflexDC13

Some odd hazards render the line between monster and trap a pointless exercise in semantics. This ooze has no discernable consciousness, but its hunger is undeniable.