Zombie head
Jade idol head was removed from RuneScape after an update, but still exists in-game for those who had obtained it.
[FAQ] • [doc]

The jade idol head was a common reward from the Squeal of Fortune. They were part of the Grinning idol promotion. Combined with the body and arms and legs to get experience in the Construction, Defence, Herblore, Mining, and Woodcutting skills.