Ball Lightning

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Haste (This creature can attack and
as soon as it comes under your control.)

At the beginning of the end step, sacrifice this creature.

Rarity

Set

Number

Rulings

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.