Dropping the Tooth on the ground or leaving it in a stationary container will cause the Extra-Adorable Lavae to stay by that location. If the Extra-Adorable Lavae dies, the Lavae Tooth will turn to Ashes.
Lavae Eggs can be obtained by killing the Dragonfly. They will hatch after leaving them near a constant heat source for 2 days.
If Krampus steals this item, the Extra-Adorable Lavae will start to follow Krampus.