Pokémon TCG Japan: Paradigm Trigger Preview: Promo Pack Cards
Purchasing a booster box of Pokémon TCG Japans Paradigm Trigger set will earn a five-card promo pack in which special cards can be found.
Alolan Vulpix Paradigm Trigger Preview Promo Pack Paradigm Trigger Galarian Legendaries Regidrago Incandescent Arcana
Source: bleedingcool.com