Arkan, Knight Of Lugrin

Flying
Territory (As long as you have dealt 8 or more
damage to a player this turn, whenever Arkan enters
the battlefield, exile amountain and establish Arkan's territory. You may only have one territory established
at a time.)
As long as Arkan has a territory established,
whenever a creature you don't control enters the battlefield or attacks, deal 2 damage to it.