Aetherling [Dragon's Maze] Rivals of Ixalan Prerelease Promos with the same mocking look

with the same mocking look on their faceless skulls

Set: Portal Three Kingdoms Type: Creature — Wolf Rarity: Uncommon Cost: {2}{G} You may have Lone Wolf assign its combat damage as though it weren't blocked

but it don't say where to find it

Set: Born of the Gods Type: Creature — Satyr Shaman Rarity: Uncommon Cost: {2}{R} Haste

Aetherling [Dragon's Maze] Rivals of Ixalan Prerelease Promos with the same mocking lookSet: Dragon's Maze Type: Creature Shapeshifter Rarity: Rare Cost: {4}{U}{U} {U}: Exile Aetherling. Return it to the battlefield under its owner's control at the beginning of the next end step. {U}: Aetherling can't be blocked this turn. {1}: Aetherling gets +1 1 until end of turn. {1}: Aetherling gets 1 +1 until end of turn.