+halls (2)
Rather than pay the mana cost for a spell, its controller may discard a card that shares a color with that spell.
Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Creatures that attacked during their controller's last turn can't attack.
Gatherer works better in the Companion app!