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

A ring of sand is a ring that could be obtained by handing in a total of 15,000 beach sand to Reyna throughout the duration of the 2017 Build A Beach event.

Activating the ring will morph the player into a pile of sand.