Kokushibyo, locus of plague

When kukoshibyo enters the battlefield you lose 5 life and sacrifice a non-token creature. If kukoshibyo's power is equal to five or less it has deathtouch and is unblockable, if its power is above five it has flying and lifelink. Kokushibyo's power is equal to the combined power of all creatures in graveyards power. It's toughness is equal to the combined toughness of all creatures in graveyards.