Gruul Rageblade

Bloodrush -- {r}{g}, Discard Gruul Rageblade: Target attacking creature gets +2/+3 and gains "as long as you control another creature with power above its base power, this creature has double strike" until end of turn.
As long as you control another creature with power above its base power, Gruul Rageblade has double strike.
None have mastered the rage like the Gruul.