"Magic 2015 Core Set", +"can't attack", +!defender, +!detain, +!"you may change" (3)
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Glacial Crasher can't attack unless there is a Mountain on the battlefield.
Enchant creature
Enchanted creature can't attack or block unless its controller pays .
Activated abilities of enchanted creature cost more to activate.
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
All lands are Islands in addition to their other types.
Creatures without flying or islandwalk can't attack.
Gatherer works better in the Companion app!