Karatas, The Balance

+1: Choose a creature. Put a +1/+1 counter or a -1/-1 counter on it.
-7: Put a +1/+1 counter on each creature you control. Proliferate, then proliferate again.
: As long as your devotion to white, black and green is less than eight, you can't activate any of Karatas' abilities and he can't be attacked.