Necrotic Bone

The Necrotic Bone is an item added by Tinkers' Construct, which is sometimes dropped by Wither Skeletons. Using a Tool Forge, the Necrotic Bone can be integrated as an upgrade into weapons, which occupies a modifier and gives the special ability "Lifesteal". This ability steals 10% of the dealt damage and gives it to the player health. It can also be used to craft Red Heart Canisters, increasing the player's maximum health.