22 cards where the set is “pdom” and the cards are cards with a non-date stamp

Benalish Marshal (Dominaria Promos #6p)
Blackblade Reforged (Dominaria Promos #211p)
Cabal Stronghold (Dominaria Promos #238p)
Clifftop Retreat (Dominaria Promos #239p)
Forebear's Blade (Dominaria Promos #214p)
Gilded Lotus (Dominaria Promos #215p)
Goblin Chainwhirler (Dominaria Promos #129p)
Helm of the Host (Dominaria Promos #217p)
Hinterland Harbor (Dominaria Promos #240p)
History of Benalia (Dominaria Promos #21p)
Isolated Chapel (Dominaria Promos #241p)
Karn, Scion of Urza (Dominaria Promos #1p)
Lyra Dawnbringer (Dominaria Promos #26p)
Marwyn, the Nurturer (Dominaria Promos #172p)
Shalai, Voice of Plenty (Dominaria Promos #35p)
Siege-Gang Commander (Dominaria Promos #143p)
Squee, the Immortal (Dominaria Promos #146p)
Steel Leaf Champion (Dominaria Promos #182p)
Sulfur Falls (Dominaria Promos #247p)
Tempest Djinn (Dominaria Promos #68p)
The Antiquities War (Dominaria Promos #42p)
Woodland Cemetery (Dominaria Promos #248p)

It is the moment of discovery, the triumph of the mind, and the end of these results.