custom card yugioh MTG meets in this mashup Custom Cards: Masks

Thats right, this Dark type version of Spiritomb has the Sealing Scream ability, which prevents all players from using Ace Spec cards

MHR cards require 35+ Enhanced Boxes on average, which is around $6,300+ at MSRP

Exdeath, Void Warlock / Neo Exdeath, Dimensions End Exdeath, Void Warlock has a transform condition thats pretty easy to meet, which is good because the cards power rests in Neo Exdeath, Dimension's Enda card that has my vote for Magic card that looks most like it came from Yu-Gi-Oh

The plan was to build the whole binder out of acrylic as a little clamshell box that would hold the pages inside, with walls all the way around so nothing could fall out

No, it's all or nothing