The main set contains 254 cards (5 basic lands, 101 commons, 80 uncommons, 53 rares, 15 mythic rares), and includes randomly insertedpremiumversions of all cards. Additional cards are found in the set's collector boosters, planeswalker decks and brawl decks. A unique Buy-a-Box promotional card is also considered to be part of the set. Cards with alternatecard frameshave another card number than the original version.Borderlessplaneswalkers are numbered #255-257,Showcase cardsare numbered #258-268, the Buy-a-Box is #269, planeswalker deck cards are numbered #270-277, non-constellation basic lands are numbered #278-287, Theme Booster rares are #288-297 andextended artworkcards are numbered #298-351. TheBundle promois numbered #352. Finally there are FNM-treatment cards from theUniversal promo packnumbered #353-357. Both regular and foil versions of these cards may be found in the collector boosters.
The set features five specialNyx-inspiredfull-artconstellationbasic lands(one per pack).The non-constellation basic lands are only found in supplemental products.These regular-border lands depict the "Above and Below" of Theros and its underworld.Besides the five basic lands, there are 11 constellation showcase cards. These are all thegodsanddemigods.
The Gods are at war, and they bring their champions to fight. Elspeth breaks free and defeatsHeliodwith a weapon created from her past traumas. Klothys finds out about Elspeth escaping the underworld so she is sendingsomeoneto bring her back to the Underworld or capture her.
Theros Beyond Deathintroduces thekeyword actionEscape; spells with escape can be cast from thegraveyardfor their escape cost.The cost includesexilinga number of other cards from the graveyard. Certain creatures receive an additional bonus as theyescape.
Returning mechanics from the Theros block areConstellationandDevotion.Constellation now also appears on non-enchantment cards, and only on non-enchantment cards.