Ochre Jelly

An ochre jelly is a yellowish ooze that can slide under doors and through narrow cracks in pursuit of creatures to devour. They have enough bestial cunning to avoid large groups of enemies. An ochre jelly follows at a safe distance as it pursues its meal. Its digestive enzymes dissolve flesh quickly but have no effect on other substances such as bone, wood, and metal.

Thanks to Gundren the party lears that this creature is resistant to Acid, immune to lightning and slashing and cannot be Blinded, Charmed, Deafened, exhausted, Frightened or Prone. Furthermore it navigates with Blindsight.