Sphinx of Forgotten Lore (Borderless) (Mana Foil) [Foundations] BT8-090 you may prevent it from

you may prevent it from leaving play by trashing a level 6 Digimon card in this card's digivolution cards

2 Deck boxes

or if your opponent controls a monster

[When Digivolving] 1 of your opponent's Digimon gets -16000 DP for the turn

Set: Foundations Prerelease Promos Type: Creature — Dragon Rarity: Mythic Cost: {3}{R}{R} Flying

Sphinx of Forgotten Lore (Borderless) (Mana Foil) [Foundations] BT8-090 you may prevent it fromSet: Foundations Type: Creature Sphinx Rarity: Mythic Cost: {2}{U}{U} Flash (You may cast this spell any time you could cast an instant.) Flying Whenever this creature attacks, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to that card's mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)