Shinigami

Deathtouch, indestructible

If your devotion to white, blue, black and red
is less than seven, Shinigami isn't a creature.

Whenever another creature enters the battlefield from a players hand, it gains vanishing 4. (This creature enters with four time counters in it. At the beginning of your upkeep, remove a time counter from it. When the last one is removed, sacrifice it.)