Let the opponent fill all his rows with creatures, drop their atk to zero. Stall the game this way. Skip turn, let him fill his hand with cards, get your bird. Play 1 bird followed by 1 volition per turn for a surprise 9 damage the guy cannot do anything against. If he keeps his last spot for some special creature, fill it with your own clay effigy. Replace mend with smite if you want It's a great troll.