Dont forget Wizard Class or Spellbook to achieve infinite hand size so you dont have to discard any cards
Players in the cEDH community are already eyeing up decks like Magda and Brago as potential homes for this, for that reason
The most useful workflow is to identify the exact card, confirm variant details such as holo, reverse holo, first edition, set number, language, and condition, then compare recent sold comps and marketplace references before deciding on a realistic price
Most white token decks will love this as more redundancy, and for enabling some wild plays that the other five/six mana options just cant
When there's popularity, there's going to be some rare cards that everyone wants to get their hands on and the most rare in any TCG tends to be limited promo cards