Zombie head
D&D token (troll invasion) was removed from RuneScape after an update, but still exists in-game for those who had obtained it.
[FAQ] • [doc]
D&D token (troll invasion) detail

A D&D token (troll invasion) is an item gained from the Squeal of Fortune, granting the player an extra game of Troll Invasion during the same month. Only one such token can be used each month.