Pan Gu, the Creator

Indestructible
As long as your devotion to white, blue, black,
red, and green is less than twenty, Pan Gu isn't a
creature.
{t}, Pay X life twice: You may cast a spell from
your hand with converted mana cost X without
paying it's mana cost.
Pan Gu, the Creator's power and toughness are
each equal to your life total.