Ravensburger has done a great job of getting us all excited
Like most Magic: The Gathering cards, the value of Aerith Gainsborough depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Pro Tour Promos)
Don't miss your chance to pick one of these Mystery Boxes up
So do your homework and hedge your bets by building a solid collection before cashing out for that coveted PSA 10 Charizard
This would usually be enough to find Pandemonium and some combination of Phyrexian Dreadnought and Reanimate, plus the mana to play them And a Final Fortune might end the game before the opponent has even taken a turn(!)
You could go big with reanimation spells like Reanimate and Necromancy to recur massive threats or take a grindier option with Regrowth, Gravedigger, or Reassembling Skeleton effects to turn your graveyard into another pile of resources