For instance, in Secrets of Strixhaven , play boosters have a 1 in 55 chance of having one (or 1.81%), in MH3 , a Special Guest showed up in one of every 15.5 collector boosters
But with the return of Sagas and the introduction of the Omen cycle along with much more enchantment removal, even the lowly Mystic can get big enough to attack in the late game
If you're unsure, compare it carefully to an authentic one
The Pokmon TCG scene as a whole is riding such a hype wave at the moment that even regular booster packs from new Pokmon sets are in incredibly short supply and sell for well over their retail price - let alone ultra rare relic singles like Pikachu Illustrator
As that trigger resolves, the battle is exiled and then the back face is cast without paying any mana cost which is handy as the back sides dont have mana costs, anyway