They cannot attack your opponent directly or be Tributed, except for a Tribute Summon.) When that face-up Xyz Monster leaves the field, destroy these tokens
Others might be a little more obscure, or less MTG-focused, but either way there are plenty of avenues to turn your cards into cash
GradedGuard Standard Graded Card Guard (PSA)
That way all players joining can just admire the beauty of the card sleeves and not even think about markings
Well, it's a trap with not that great of a graveyard effect, so even if you wanna build a going first version of the deck, play at most 1, most builds - because of Master Duel's BO1 format - will play 0
Its almost always used as a secondary creature type in conjunction with a more popular one (vampire horror, for example), though there are a few stand-alone horrors