Evolution: Put on 1 of your Parasite Worms or Origins
Meteor Burn: When this creature attacks, you may put 1 card under this creature into your graveyard. If you do, destroy 1 of your opponent's creatures with "Blocker".
Even poisonous gas, with the power to kill tens of thousands in an instant, pales in comparison to the methods used by the ancient darkness. To them, such a method is... primitive.