Break Through the Line

Oracle Text

R: Target creature with power 2 or less gains haste until end of turn and can't be blocked this turn.

Card Rulings

11/24/2014 If the creature’s power is greater than 2 as the activated ability tries to resolve, the ability won’t resolve and none of its effects will happen. However, if the creature’s power is raised above 2 after the ability resolves, it will still have haste and can’t be blocked that turn.