Enchant creature When Claustrophobia enters the battlefield, tap enchanted creature. Enchanted creature doesn't untap during its controller's untap step.
2015-06-22
Claustrophobia can target and enchant a tapped or untapped creature.
2015-06-22
The enchanted creature can still be untapped in other ways. Claustrophobia will remain attached, and the creature will continue to not untap during its controller's untap step.