Flail snail

Flail snails were earth-based creatures that produced a number of valuable resources. The residue they left behind as they moved could be harvested to produce glass, and their colorful shells could be used to produce protective magical items, such as spellguard shields and robes of scintillating colors.

Combat
Flail snails had typically five tentacles that were kept in constant motion, flailing everything in their path. If a tentacle was sufficiently damaged it would die, but the snail would remain alive and could regrow lost tentacles after a few days, as long as at least one tentacle remained alive.

If all tentacles were killed, the snail retracted into its shell and started crying out a loud wailing sound for several minutes until it died or had its tentacles restored, such as through a regenerate spell. The cry of a dying flail snail could potentially attract other monsters to the site.