Fumikage Tokoyami

X: Black Abyss - Fumikage equips Dark Shadow wearing it like a suit of armor. equipping Dark Shadow mitigates his close-range weak.
+10: Piercing Twilight Claws - Fumikage shoots out Dark Shadow's claw which attacks at great speed.
+20: Ragnarök - in dark conditions, Dark Shadow's power grows exponentially to the point where he himself can't control it.