Pallete Swap

If a mono-colored creature would be put into a graveyard instead return it to play, place a 1+/+1 counter on it and move it once left on the color pie (if was white it is now green, if it was green it is now red, if it was red it is now black, if it was black it is now blue and if it was blue it is now white).
If a creature has more than four +1/+1 counters exile it.