Riot's BFG

{t}: add {c}

Whenever an elemental under your control dies, place an ammo counter on this land.

{t}: Remove X ammo counters, Riot's BFG deal damage
to any target equal to 3 times the number of ammo counters removed this way.

"You can't just blast a hole into the Mage City."
—Sylvia (probably) before being proven very wrong