The Rensa Grub is an enemy found in the Rensa Fields. It slowly crawls around open fields eating tiny mites in the grass.
Has very strong DEF, MDEF, and high HP. Use Slash's Shell Breaker to weaken him dramatically.
Turn 0: Do nothing
Turn 1x4: Harden Shell - Raises own DEF.
Turn 2x4: Flood - Mag water damage (x1.0 + 130)
Charge forward - Phy attack (x1.5)