Proxy a theme package. Pick 1025 Elden Ring reskins for your commander, key creatures, and signature spells, then print the rest as normal MTG versions so the deck stays readable and consistent.
Like the previously listed Yu-Gi-Oh
Due to its scarcity, its certainly possible that this cards already remarkable value will continue to increase as time passes, since this card has only been on the open market for less than a year
Its also very potent in Commander if you feel like investing in a copy
Nightbound (If a player casts at least two spell during their own turn, it becomes night next turn.) Whenever this creature enters or transforms into Brutal Cathar, exile target creature an opponent controls until this creature leaves the battlefield
"We try not to make cards in these decks that hit competitive eternal formats" Weve seen the occasional Commander/Universes Beyond card get tried out in Magics Legacy format recently, stuff like Forth Eorlingas