Aerith, Last Ancient offers a lifegain payoff you will almost never pull off in an actual game because aside from Sephiroth, Fallen Hero or Wrecking Ball Arm there's no other way to reliably get her to 7 power and very little lifegain in the deck otherwise
$1.99 Summon: Leviathan Final Fantasy $0.49 Summon: Good King Mog XII Final Fantasy Commander Decks $32.99 Summon: Bahamut Final Fantasy $2.49 Summon: Yojimbo Final Fantasy Commander Decks $0.79 Esper Origins Final Fantasy $1.49 Esper Origins Final Fantasy $0.49 Sunpetal Grove Final Fantasy Commander Decks $0.59 Summon: Fenrir Final Fantasy $3.99 Eidolon of Blossoms Journey into Nyx $0.49 Summon: Ixion Final Fantasy Commander Decks $0.49 Summoner's Grimoire Final Fantasy $1.99 Summon: Primal Odin Final Fantasy 0 results found
Honestly, Arena is the reason I've gotten into Magic in such a big way
Ultimately, it wont be worth doing so if your deck doesnt have some manner of sacrifice theme and ways to use the extra mana, but Magic has been incredibly long on both of those things for years now, and sacrifice decks show up in more and more Cubes all the time
Yes, it is possible to exit play mode on the first or second packet selection screen without losing the 1000 gp