Enchant creature Enchanted creature can't attack or block, and its activated abilities can't be activated. Whenever a creature an opponent controls enters, you may attach Prison Term to that creature.
2008-05-01
The last ability works only if Prison Term is already on the battlefield. You may move it from the creature it's currently enchanting onto the new creature.
2016-06-08
Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities and will have colons in their reminder text.