The great thing about Jumpstart is that its cheap a new account grants you enough currency to try the mode three times and the cards you pick are yours to keep
While I have been writing this article, Scar's Enchanted card has increased in listed price on TCGPlayer by a considerable amount, and hopefully will not fall back down soon
With these Enchanted cards plus the standard and foil variants of the others, there are a total of 420 available cards for The First Chapter, not including the non-playable oversized foils included in some gift sets
Expect additional analysis here on Polygon in the days and weeks to come
This can only be done once per game, and is usually helpful if you draw a hand without many inkwell icons (which are used to play cards and use abilities) or containing too many expensive cards for the start of the game
Its one thing that has kept Amethyst/Steel in check during the Azurite Sea meta, though that might be about to change