2007-10-01
Glimmerdust Nap can target only a tapped creature.
2007-10-01
If the enchanted creature becomes untapped, Glimmerdust Nap is put into its owner's graveyard as a state-based action.
2007-10-01
If the targeted creature has become untapped by the time Glimmerdust Nap would resolve, Glimmerdust Nap doesn't resolve for having an illegal target.