Sorcery, 2GGG (5) Creatures you control get +3/+3 and gain trample until end of turn. (If a creature you control would deal enough damage to its blockers to destroy them, you may have it deal the rest of its damage to defending player or planeswalker.)1 Nature doesn't walk.
Illus. Carl Critchlow
10/1/2009: Overrun affects only creatures you control at the time it resolves. It won't affect creatures that come under your control later in the turn.