Onaki, Great Enlightener

Double prowess, Vigilance, Lifelink, Haste.
Creatures you control gain prowess. Other
creatures you control with prowess or double
prowess are immune to non-combat damage.
You may cast spells from the top of your library
or from your graveyard. Unused red and white
mana you tap doesn't resolve but you may only
use it to cast instants and sorceries.