The Promo set consists of 24 cards of various origins. The entire 12-card Essence Orb set was released under the Promo category, and the other 12 cards in the set come from various promotional special releases, like the Halfling Alchemist that was created in celebration of the BTC halving of 2020 and such Mystery Potion Reward cards as Archmage Arius, Prince Julian and the Mighty Dricken.