Raest, Jaghut Tyrant

Warren (Instants and sorceries you control that share
a color with this creature cost {1} less. Whenever you cast an instant or sorcery that shares a color with this creature, you may have this creature deal 1 damage to target creature or player.)
{u}{u}{u}: Gain control of target creature with toughness less than Raest, Jaghut Tyrant.
{3}: Raest, Jaghut Tyrant gets +1/+1 until end of turn.