Ice Cage | Magic: The Gathering
Formats Ice Cage is Legal in
Official Oracle Text for Ice Cage
Enchanted creature can't attack or block, and its activated abilities can't be activated.
When enchanted creature becomes the target of a spell or ability, destroy Ice Cage.
Official Rulings for Ice Cage
7/1/2013 : Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities; they have colons in their reminder text.