28 cards where the set is “mom” and the cards have a custom Showcase frame

Ayara, Widow of the Realm // Ayara, Furnace Queen (March of the Machine #296)
Ayara, Widow of the Realm // Ayara, Furnace Queen (March of the Machine #296)
Baral and Kari Zev (March of the Machine #302)
Borborygmos and Fblthp (March of the Machine #303)
Djeru and Hazoret (March of the Machine #304)
Drana and Linvala (March of the Machine #305)
Elesh Norn // The Argent Etchings (March of the Machine #292)
Elesh Norn // The Argent Etchings (March of the Machine #292)
Errant and Giada (March of the Machine #306)
Etali, Primal Conqueror // Etali, Primal Sickness (March of the Machine #298)
Etali, Primal Conqueror // Etali, Primal Sickness (March of the Machine #298)
Ghalta and Mavren (March of the Machine #307)
Glissa, Herald of Predation (March of the Machine #308)
Heliod, the Radiant Dawn // Heliod, the Warped Eclipse (March of the Machine #293)
Heliod, the Radiant Dawn // Heliod, the Warped Eclipse (March of the Machine #293)
Hidetsugu and Kairi (March of the Machine #309)
Inga and Esika (March of the Machine #310)
Jin-Gitaxias // The Great Synthesis (March of the Machine #294)
Jin-Gitaxias // The Great Synthesis (March of the Machine #294)
Kogla and Yidaro (March of the Machine #311)
Kroxa and Kunoros (March of the Machine #312)
Omnath, Locus of All (March of the Machine #313)
Polukranos Reborn // Polukranos, Engine of Ruin (March of the Machine #300)
Polukranos Reborn // Polukranos, Engine of Ruin (March of the Machine #300)
Quintorius, Loremaster (March of the Machine #314)
Rankle and Torbran (March of the Machine #315)
Rona, Herald of Invasion // Rona, Tolarian Obliterator (March of the Machine #295)
Rona, Herald of Invasion // Rona, Tolarian Obliterator (March of the Machine #295)
Sheoldred // The True Scriptures (March of the Machine #297)
Sheoldred // The True Scriptures (March of the Machine #297)
Thalia and The Gitrog Monster (March of the Machine #316)
Urabrask // The Great Work (March of the Machine #299)
Urabrask // The Great Work (March of the Machine #299)
Vorinclex // The Grand Evolution (March of the Machine #301)
Vorinclex // The Grand Evolution (March of the Machine #301)
Yargle and Multani (March of the Machine #317)
Zimone and Dina (March of the Machine #318)
Zurgo and Ojutai (March of the Machine #319)

In the blink of an eye, they strode from deep snow to the end of this search.