Bonelace

This spell is the exact opposite if Boneleech. This spell forces a creature's skeleton to begin producing more bone than it needs. However, instead of making the bone itself thicker and stronger, the extra bone manifests itself as tiny, sharp shards that sprout from the main bones like a calcium tree within the victim's body. The spell garners it's name from what the victims look like when sliced open after the spell has taken effect. If bisected laterally, the body would look like it was filled with a delicate lace.