Galeem, Bane of Darkness

Galeem, Lord of Light's mana cost is equal to
your life total.
Flying, Annihilator 5, Protection from non-black.
Creatures you control with toughness lower than
five have base power and toughness five.
At the beginning of your turn, gain control of
target creature, except that creature becomes a
white 5/5 creature with protection from
non-black.