I can provide some handy links to bookmark so you can check back in, but for now, your best chance of securing anything will be via the most trusted third-party resellers like TCGPlayer
Lloyd Coombes is an experienced freelancer in tech, gaming and fitness seen at Polygon, Eurogamer, Macworld, TechRadar and many more
You simply sacrifice the token you generate to Sephiroth to draw a card when it enters or attacks, and the token will respawn to keep the engine rolling

Here are the full lists of each card in each set: Secret Lair x Final Fantasy : Game Over Final Fantasy VI Merciless Poisoning Sorcery (Toxic Deluge) Final Fantasy VII Meteorfall Sorcery (Star of Extinction) Final Fantasy VIII Absorb into Time Sorcery (Temporal Extortion) Final Fantasy X Spiras Punishment Sorcery (Day of Judgment) Final Fantasy XV Unseat the Usurper Sorcery (Praetors Grasp) Secret Lair x Final Fantasy: Grimoire Final Fantasy VII Aeriths Curaga Magic Instant (Heroic Intervention) Final Fantasy IX Vivis Thunder Magic Instant (Lightning Bolt) Final Fantasy X Yunas Holy Magic Sorcery (Prismatic Ending) Final Fantasy XIII Hopes Aero Magic Instant (Cyclonic Rift) Final Fantasy XV Noctis Death Magic Sorcery (Damn) Secret Lair x Final Fantasy: Weapons Final Fantasy VII Clouds Buster Sword Artifact (Umezawas Jitte) Final Fantasy X Tidus Brotherhood Sword Artifact (Sword of Truth and Justice) Final Fantasy X Yunas Sending Staff Artifact (Staff of the Storyteller) Final Fantasy XIV Gaias Dark Hammer Artifact (Colossus Hammer) Final Fantasy XVI Clives Invictus Blade Artifact (Blade of Selves) And heres a gallery I made showing how all of them look

You're incredibly vulnerable to removal , and anything big enough to take out a character before Julieta can get in there and heal it is going to absolute devastate your game plan.
If money was no object, you could work in three high-value Legendary characters: Snow White, Well Wisher, Rapunzel, Gifted with Healing, and Alice, Growing Girl