Zombie head
Incomplete obsidian idol (head, body, arms) was removed from RuneScape after an update, but still exists in-game for those who had obtained it.
[FAQ] • [doc]
Incomplete obsidian idol (head, body and arms) detail

The Incomplete obsidian idol (with the head, body and arms) is created by combining an obsidian idol head, obsidian idol body and obsidian idol arms. It provides experience in the Construction, Defence, Herblore, Mining, and Woodcutting skills.