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

Shuriken stamps are an item used to skip tasks in the Death Lotus Training event. They may be won on Treasure Hunter, or received from the Ninja Master.

The "Retrieve Scroll" option can be used to put the Death Lotus training scroll into the inventory.

Once you have reached prestige level 4, each one may be converted into a prismatic small fallen star.