They've been carefully stored in sleeves
Feature 20-50 graded cards per show, warming up with lower-value slabs and building to 3-5 hero cards (PSA 10s, vintage holos)
My idea for the new effect would be, "An Xyz monster with this card as an xyz material gains the following effect: (1) During the end phase of either players turn you can xyz summon 1 xyz monster that is attached to this card as an xyz material using this card as the xyz material (Any other xyz materials attached to this card become materials to the new xyz monster aswell.)" Thought it would fit the card and zen-maintenance well
Meaning that aside from the Supporters, an entire deck can be easily made out of shiny gold cards in the modern era
The fun suit isnt alone, either
Thats an eternity in Commander, so I wouldnt expect Concierge to come back more than once per game, but that also means the other creatures youre suspending in limbo also become non-factors most of the time