This content is not being reintroduced in AvalonMod 1.2+ TAPI versions.
This is an Avalon item used to summon Skeletron after his initial defeat.
You cannot use this item before Skeletron has been defeated.
This is also used to make the Essence of Easymode.
To craft it requires : 30 Bone, 3 Undead Shard at a Demon Altar.