Kou-Toa Warrior

Whenever you cast a creature spell summon a 3/1 dark Kou-Toa creature token.
When Kou-Toa Warrior attacks and targeted player has an island mana Kou-Toa Warrior gets +1/+1 until end of turn.
When Kou-Toa Warrior attacks and targeted player has a plains mana Kou-Toa Warrior gets -1/-1 until end of turn.