Volrath's Stronghold [Stronghold] Khans of Tarkir Prerelease Promos you may have this creature

you may have this creature become a copy of target creature

−2: Create a 4/4 red Dragon creature token with flying

put those cards into your hand

Set: Mirrodin Type: Artifact Rarity: Rare Cost: {X}{X} Chalice of the Void enters the battlefield with X charge counters on it

Set: Amonkhet Invocations Type: Creature — Avatar Rarity: Mythic Cost: {6}{B}{B} If there are ten or more creature cards total in all graveyards

Volrath's Stronghold [Stronghold] Khans of Tarkir Prerelease Promos you may have this creatureSet: Stronghold Type: Legendary Land Rarity: Rare {T}: Add {C}. {1}{B}, {T}: Put target creature card from your graveyard on top of your library. The seed of a world's evil.