mtg arena missing cards Flatline | Universes Beyond: Doctor Who | Standard if there are four or more card types among cards in your graveyard THE MISSING PIECE FOR PIXIE!

I understand that this is a one-of-a-kind card, and that surely makes it special

The deck using it won the Pro Tour does that count

[...] The most common feedback was not to mix Universes Beyond with Magic in-universe sets."Mark Rosewater, magic.wizards.com, 2023/08/19

As such, it's interesting to see Cloud, Midgar Mercenary, at a similar price point, and it makes perfect sense for the Japanese exclusive version of the black Traveling Chocobo to be even more expensive and possibly among the most expensive MTG cards ever

And you are casting the spell

As many times as you want, provided that you have enough energy counters to use the ability