There are some key differences between each deck which we will dive into, but your overall choice isn't too important
Being an incredible starter for all manner of WATER decks, the ones that have seen experimentation are Mermail-Atlantean, and Ice Barrier, although Ghoti fans claim it fixes many of the strategys woes
Unlike the cards in the main set, Through the Ages cards do not become legal in Magic's Standard format (though they still are if the existing card was already legal there, of course), essentially just making them alternate art versions of those cards
The number of things that have been breached by inflation has increased considerably, but there is no change in being strong
The Final Fantasy crossover will launch on 13th June and consists of four decks based on Final Fantasies 6, 7, 10, and 14
The synergies available are in strong mono-green combo pieces like Priest of Titania that generate a bunch of mana based on the number of elves you control, or cards like Craterhoof Behemoth, which will boost your elves for the win