Shadow Dragon

Affinity for Black, White, and Artifacts, Haste, Hexproof

If you control both Golbez and Shadow Dragon, they each have Shadow. When Golbez leaves the battlefield, exile Shadow Dragon.

{b}{b}{t} Black Fang —Destroy target creature. It can't be regenerated.
{w}{w}{w}{t} Binding Cold —Tap all creatures target opponent controls. They do not untap during their controller's untap step.