“I'm not going anywhere near that!”
“Likes destroying things as much as I do.”
“It thinks only of destruction.”
“A MALWARE FLESHSACK”
“Hope it's not a wood-boring worm.”
“It's doing all my work for me.”
“It appears to have a contentious relationship with the humanoid hexapod invertebrates.”
“It will nöt röb me öf a battle!”
“Pretty destructive for a big baby bug.”
“Yeesh. That guy needs to chill out.”
“I could make it more palatable if I could mash it into a paste.”
“A leviathan from tha' depths.”
“THERE'S THE GRUB”
“My guess is he's not too interested in making friends.”
Giant Grubs are non hostile Mobs exclusive to the Hamlet DLC. They will spawn in Mant Hills. They act similar to Depths Worms in the Caves; they will burrow underground and then attempt to bite their target, but will also damage nearby mobs when going back underground. It will respawn roughly fifteen seconds after being killed. They will neither spawn within Warrior Mant rooms, nor the Queen Womant's room.
Their main purpose is to ensure that the player doesn't set their base up in a Mant hill, even if the nest has been cleared. Their short respawn time and bad drop(s) further proves this claim. Worse comes to worse, Giant grubs aren't all bad as they are somewhat decent at defeating the Mants present in the hill or distract them at the very least, though they will barely make a dent on anything else, including themselves.