Ball Lightning (R)

Name: Ball Lightning
Cost: RRR
Type: Creature — Elemental
Pow/Tgh: (6/1)
Rules Text: Trample (If this creature 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.)
Haste (This creature can attack and {T} as soon as it comes under your control.)
At the beginning of the end step, sacrifice Ball Lightning.
Set/Rarity: Magic 2010 Rare, Masters Edition Rare, Beatdown Box Set Rare, Fifth Edition Rare, Fourth Edition Rare, The Dark Rare