Even if your opponents kill Thassa's Oracle before its trigger resolves, you still win, so the only way to stop this is with countermagic or a Stifle effect
Players who make their Secret Lair Secretversary Superdrop purchase from Nov
That said, there are two main ways that players can make money via cards: Gamers can sell the sealed packs, or they can open the packs and sell their contents
My flight of adventurous dragons also included Young Blue Dragon and Young Red Dragon (there is no Young Green Dragon), Dread Linnorm (a Snake Dragon), Sailor's Bane (a Dragon Turtle), Sword Coast Serpent (a Serpent Dragon), and Fang Dragon (sadly, just a Dragon)
But if I needed it to be truly NM or Mint, Id go with a more reputable seller or, again, just buy graded and crack open
Ghoulcaller GisaCasting Cost: Card Type: Legendary Creature - Human WizardPower/Toughness: 3/4Card Text