Oblivion Stone [Kaladesh Inventions] Dragons of Tarkir Prerelease Promos you may exile target creature

you may exile target creature you control

if Nether Shadow is in your graveyard with three or more creature cards above it

'The day is not over yet

You may have Sakashima's Student enter the battlefield as a copy of any creature on the battlefield

{B}: Regenerate Wall of Bone

Oblivion Stone [Kaladesh Inventions] Dragons of Tarkir Prerelease Promos you may exile target creatureSet: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {3} {4}, {T}: Put a fate counter on target permanent. {5}, {T}, Sacrifice Oblivion Stone: Destroy each nonland permanent without a fate counter on it, then remove all fate counters from all permanents.