Kuzeorth, Spirit Dragon

+1: Draw a card, exile and create a 1/1 spirit dragon with flying, or put it in to your hand and lose 1 life.
-2: Dragons you control get +2/+2 till end of turn.
-7: Kuzeorth, Spirit Dragon becomes a 4/4 dragon with flying and vigilance that get +1/+1 for each spirit dragon you control, it stays a planeswalker