Ball Lightning

{R}{R}{R} · Creature — Elemental

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Haste (This creature can attack and {T} as soon as it comes under your control.) At the beginning of the end step, sacrifice this creature.

Motor: se resuelve a mano

Rulings (1)

The creature is sacrificed at the end of every turn in which it is on the battlefield. There is no choice about what turn to sacrifice it.
Wizards of the Coast · 2007-02-01