Cards from 2003 onward (after Pokmon Company took over from Wizards of the Coast ) are considered modern releases
It was only available at the Pokemon Centers in Japan, in April, 2025, for a very limited time and in very limited quantity
There are actually astonishingly few threats in the current Modern metagame which survive Unholy Heat, and a lot of play patterns are defined by the existence of this card
The idea of the principled but tortured hero, outwardly invincible but emotionally vulnerable and denied solace, resonates down through dark fantasy staples from Berserk to The Witcher , as well as heavy metal
So its hitting that emotional sweet spot for long-time fans, but with some actual gameplay backbone that makes sense for players who want to integrate some of these cards with new decks and combat strategies with new moves and mons to boot