Hairball Fossil

The Hairball Fossil is a consumable item that summons Mother Cat. It requires a Demon Altar or Crimson Altar to craft. They also can spawn in chests and have a 2% chance to drop when a Cat is killed.

Crafting
Hairball Fossil can be crafted at an altar by combining 10 cobweb, 10 platinum ore, and 1 demonite/crimtane bar.