Atraxa, Corruption Clarion

({p/b} can be paid with either {b} or {1} and you get P.)
Flying
As long as you have at least PPPPPP, whenever Atraxa, Corruption Clarion attacks or blocks, distribute two -1/-1 counters among up to
two target creatures.
As long as you have at least PPPPPPPPP, at the beginning of your end step, proliferate.