From doubling ETB's like Kefka, Court Mage's trigger to doubling cast triggers like the Black Wizards from Kuja, Genome Sorcerer, this guy does it all
To farm Battle Pack cards, just do standard method of surrendering every duel, then it'll ask you to add the cards to your trunk, which you should, of course, say YES to
Doubling those counters quickly wipes boards or leaves enemy defenses severely weakened
you cannot Special Summon monsters from the Extra Deck for the rest of this turn, also Special Summon this card, and if you do, Special Summon 1 "Vassal Token" (Thunder-Type/LIGHT/Level 1/ATK 800/DEF 1000) to your opponent's field in Defense Position
With each new region, from Kanto to Galar, Eevee has received new evolutions, such as Sylveon in the Kalos region, which have kept it relevant and exciting for players
But hey, to each their own