In Garruk's Wake [Magic 2015 Promos] Eternal Masters you may return Dragon Shadow

you may return Dragon Shadow from your graveyard to the battlefield attached to that creature

touching the ideals from which all creatures draw their power

any player may exile three cards from their graveyard

sacrifice it unless you pay its echo cost

Set: Mystery Booster Type: Legendary Creature — Aetherborn Rogue Rarity: Rare Cost: {2}{B}{B} Deathtouch

In Garruk's Wake [Magic 2015 Promos] Eternal Masters you may return Dragon ShadowSet: Magic 2015 Promos Type: Sorcery Rarity: Rare Cost: {7}{B}{B} Destroy all creatures you don't control and all planeswalkers you don't control. Beyond pain, beyond obsession and wild despair, there lies a place of twisted power only the most tormented souls can reach.