amazon yugioh deck OCG Duel Monsters structure - Seto Kaiba Yu-Gi-Oh! Legendary 5D's Decks Collector's

Its pretty interesting to see

When Wizards of the Coast realized they had accidentally printed too many Base Set booster packs branded with the first-edition logo, they covered the errant symbol with a small black triangle

This is especially true for the Pokmon Trading Card Game

Exiling creatures as they go to the graveyard hampers recursion and graveyard strategies, and the incidental lifegain becomes significant when scaled to a Commander boardcasting Damnation while you control this offers perfect stabilization

inflict 1000 damage to your opponent, then this card gains 1000 ATK

Think of it as a convenience fee, as not everyone is necessarily willing to sell off cards they dont want