Roshen, the Life Bringer

If {w}{r} was spent to cast Roshen, put three charge counters on Roshen.
Sacrifice a white or red permanent: Put a charge counter on Roshen.
If there are eight or more charge counters on Roshen, sacrifice Roshen. For the rest of the game, all Zombies in play get +4/+4 and are white in addition to their other colors.