Aaru's Labyrinth

Whenever an artifact enters the battlefield you
may put a quest counter on target creature.
Each creature with a quest counter on it is tapped
and doesn't untap during its owners untap step.
Each creature with a quest counter on it has
"{5},{ut}, remove a quest counter from this
creature. (Any player may activate this ability.)"
The party stepped up to the opening of the maze and readied themselves for the challenge.