While this would not be a problem if it instead serves the higher purpose of a game-ending combo, such as Sigardas Aid, I think Ephemerate does not quite do that
(Seriously, the card isn't legendary itself, and the Demons aren't legendary either.) You can use high quality Demons like Shadowborn Demon, which has a cool trigger, or other classics like Rune-Scarred Demon
Most fans cant spend thousands on a single card
Modified Draft/Sealed Format (Using Class cards) When you get your first booster box, normally the way to go with these is to play Limited/Draft or Sealed games Unless you really like pack-cracking
Get your copies of Assault Suit ready as well, just in case you need to forge a different path
Since we run a small manufacturing company (happily with a custom case line!) We decided to make up some Magic cases for our own use