Eurachiel, Holy Death King

When this creature enters the battlefield, choose
a color then deal X damage to any target, gain X
life and all creatures you control get +X/+X until
end of turn where X is your devotion to the
chosen color
{4}{t}, Target creature in your graveyard returns
to the battlefield under your control if its mana
cost is lower than your devotion to a color in its
mana cost