Karrth, the Sinister

+2: Karrth, the Sinister deals 2 damage to target creature and 1 damage to you.
-4: Exile up to two target creatures, return those creatures to the battlefield under your control tapped and attacking, sacrifice them after combat.
-14: Destroy all nonland permanents on the battlefield, you gain control of all lands on the battlefield until end of turn, untap those lands.