Disney Lorcana: The First Chapter will feature all-new, original illustrations of beloved Disney characters on more than 200 collectible cards which will be available via three starter decks, a gift set, booster packs, and the Illumineers Trove. Disney Lorcana playmats, card sleeves, deck boxes, and card portfolios featuring Disney Lorcana art will also be available
That'll be down to how common the card is, as well as its relative weakness for play
The higher you go, the less likely your opponents are to win via attacking, but I imagine theres a sweet spot around Bracket 2/3 where this really shines
Sephiroth and Aerith are both part of the main set for Magic: The Gathering Final Fantasy, rather than the Commander Precons, so they will show up in drafts and, possibly, Standard
So it stands to reason that Enchanted Rare cards are the most highly sought after cards in any given set, especially as cards at this level of rarity are found at the rate of roughly 1 in every 72 booster packs (which is 1 in 3 booster boxes!)
Remember, though, that you lose the game if you run out of cards to draw from your deck