Avira, Half-Dragon

Partner with Schala, From Dark Returned.
First Strike.
If Avira, Half-Dragon deals combat damage to a player, choose target artifact. You gain control of that artifact.
{3}: Avira gains Shadow until end of turn.
{r/g}:Discard a card. Avira, Half-Dragon gains +X/+X, where X is that card's converted mana cost.