Convoke the Trolls

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Convoke the Trolls deals 3 damage to any target. If a creature is dealt damage this way, it gets +5/+0 until end of turn.
"I like burning and pillaging as much as anyone, but sometimes it's just easier to [...] let the trolls do the work."
—Urik, Tuskeri raid leader