All skeletons, (default, bogged, stray, and wither), now drop unique bones when killed. These new bones can be crafted into their respective variant of the bone block. In addition, a witch variant called a "Necromancer" can drop a "Reanimation Shard" when killed (~2% chance to drop).
Using two bone blocks topped with a Reanimation Shard will summon a bone golem (Same summoning structure as a snow golem). These undead behemoths can do your bidding and have the same functionality as the Snow Golem and Iron Golem.

