Kruthiks are subterranean insectoid reptiles. They hunt in packs and burrow through the earth to nest in hives. During the events of The Hand and the Eye, a Kruthik hive existed in the basement of the Elf Base until it was exterminated by the adventurers. Because kruthiks avoid areas where other kruthiks have died, additional kruthiks did not return after the adventurers took and extended rest.