Bone Block

Bone Blocks are created by the Bone Wand at the cost of 1 Bone per block. Once placed, mining them will drop Bone Blocks, rather than Bones.

Strangely, they cannot be used to craft their wall, which is instead made from bones themselves. However, four Bone Block Walls can be turned into a single Bone Block, instead of back into raw Bones.

History
뼈다귀 블록 Bloc d'Os