+Spark, +Elemental (2)
Trample, haste
At the beginning of the end step, sacrifice Hellspark Elemental.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)
Trample, haste (This creature can deal excess combat damage to the player or planeswalker it's attacking. This creature can attack and as soon as it comes under your control.)
At the beginning of the end step, sacrifice Spark Elemental.
Gatherer works better in the Companion app!
as soon as it comes under your control.)