Eventually, in the late game, it turns into a powerful card-advantage engine, drawing us a card for free each turn
However, the downside to Pokmon ex cards is that, if defeated, they enable the opponent to the player who summoned them to draw two prize cards, instead of the usual one
If we can get The Book of Vile Darkness, Eye of Vecna, and Hand of Vecna on the battlefield at the same time, we can exile them all to make an 8/8 indestructible Zombie God named Vecna, which makes Zombies, draws us cards, and gets absolutely huge in combat
That said, some modern sets have also become fairly pricey, with some of the most expensive sets coming from the Scarlet & Violet era (March 2023-July 2025) and the newest base set, Mega Evolution (September 2025-Present)
And his ability Disguise grants him Evasiveness during your turn