String Slime (BB)

A string slime can feel nearby motion through vibration and air movement.

Whenever a string slime would take slashing damage (if it weren't immune) and has at least 10 Hit Points, it splits into two identical slimes with half the original's Hit Points. One string slime is in the same space as the original, and the other appears in an adjacent unoccupied space. If no adjacent space is unoccupied, move smaller creatures and objects out of the way to make a space or the split is canceled at the GM's discretion.

The slime arcs acidic protoplasm to another string slime within 30 feet along a straight line. Each creature in that line takes 3d6 acid damage with a DC 16 reflex save. A creature that fails its save is also knocked Prone.