Ajani, Strength of the Pride #2

[+1]: You gain life equal to the number of creatures you control plus the number of planeswalkers you control. [-2]: Create a 2/2 white Cat Soldier creature token named Ajani's Pridemate with "Whenever you gain life, put a +1/+1 counter on Ajani's Pridemate." [0]: If you have at least 15 life more than your starting life total, exile Ajani, Strength of the Pride and each artifact and creature your opponents control.