What is "boneclaw"

In the Dungeons & Dragons fantasy role-playing game, the boneclaw is an undead creature which can be used by Dungeon Masters as allies or enemies of the player characters. In the game, they resemble humanoids who are half skeletal and half without skin, with their sinew and muscle exposed. The most prominent feature of the boneclaw are its claws; its three, bony fingernails seem to grow and shrink randomly between two and ten feet long, and are razor sharp. They are constructed using a secret magical ritual to hunt and kill living creatures