rCreature - Elemental

Trample, haste (If this creature would assign enough damage to its blockers to destroy them, you may have it assign the rest of its damage to defending player or planeswalker. This creature can attack and t as soon as it comes under your control.)

At the beginning of the end step, sacrifice Spark Elemental.

Vulshok shamans summon spark elementals to burn paths through thick underbrush—or through goblin salvage squads.