Creature — Elemental 6/1, GGG (3)

Trample, haste
At the beginning of the end step, sacrifice Groundbreaker.
Illus. Matt Cavotta

2/1/2007: This is the timeshifted version of Ball Lightning.
2/1/2007: 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.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern