ex series booster box Power Keepers This High Class set is centered on Mega Evolutions and Pokémon ex Pokemon Aurorus EX Box Trading

as in a pinch, you can use it as a removal spell

You only gain control of the creature until end of turn, but its a tad better than giving +2/+2

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Keys are obtained through cards, specifically Super or Ultra Rare ones - which are sourced from master packs

Grinning Grave Virus requires you to tribute a Dark Monster with less than 3,000 attack points, then has your opponent destroy one card of their choice in their hand or deck for every 500 attack the Monster you tributed had

Features unique collector booster-exclusive cards like extended art or ultra-rare headliners, enhancing your collection's uniqueness