SplinterGlossary: Promo Card
Cards launched on special occasions or as part of partnerships Splinterlands has with other entities are called promo cards.
They usually come in a very limited supply by design and some of them are valued very well on the secondary market.
Promo cards also offer a 10% bonus when played in ranked battles, if they are not included in a main edition, like Doctor Blight is in Chaos Legion.
See also Essence Orb mini-edition/Promo Cards.
Related:
Splinterlands Website
Navigate to: