50 cards where the set is “mid” and the cards have a custom Showcase frame

Plains (Innistrad: Midnight Hunt #268)
Plains (Innistrad: Midnight Hunt #269)
Island (Innistrad: Midnight Hunt #270)
Island (Innistrad: Midnight Hunt #271)
Swamp (Innistrad: Midnight Hunt #272)
Swamp (Innistrad: Midnight Hunt #273)
Mountain (Innistrad: Midnight Hunt #274)
Mountain (Innistrad: Midnight Hunt #275)
Forest (Innistrad: Midnight Hunt #276)
Forest (Innistrad: Midnight Hunt #277)
Brutal Cathar // Moonrage Brute (Innistrad: Midnight Hunt #286)
Brutal Cathar // Moonrage Brute (Innistrad: Midnight Hunt #286)
Candlegrove Witch (Innistrad: Midnight Hunt #287)
Suspicious Stowaway // Seafaring Werewolf (Innistrad: Midnight Hunt #288)
Suspicious Stowaway // Seafaring Werewolf (Innistrad: Midnight Hunt #288)
Baneblade Scoundrel // Baneclaw Marauder (Innistrad: Midnight Hunt #289)
Baneblade Scoundrel // Baneclaw Marauder (Innistrad: Midnight Hunt #289)
Graveyard Trespasser // Graveyard Glutton (Innistrad: Midnight Hunt #290)
Graveyard Trespasser // Graveyard Glutton (Innistrad: Midnight Hunt #290)
Shady Traveler // Stalking Predator (Innistrad: Midnight Hunt #291)
Shady Traveler // Stalking Predator (Innistrad: Midnight Hunt #291)
Fangblade Brigand // Fangblade Eviscerator (Innistrad: Midnight Hunt #292)
Fangblade Brigand // Fangblade Eviscerator (Innistrad: Midnight Hunt #292)
Harvesttide Infiltrator // Harvesttide Assailant (Innistrad: Midnight Hunt #293)
Harvesttide Infiltrator // Harvesttide Assailant (Innistrad: Midnight Hunt #293)
Reckless Stormseeker // Storm-Charged Slasher (Innistrad: Midnight Hunt #294)
Reckless Stormseeker // Storm-Charged Slasher (Innistrad: Midnight Hunt #294)
Spellrune Painter // Spellrune Howler (Innistrad: Midnight Hunt #295)
Spellrune Painter // Spellrune Howler (Innistrad: Midnight Hunt #295)
Tavern Ruffian // Tavern Smasher (Innistrad: Midnight Hunt #296)
Tavern Ruffian // Tavern Smasher (Innistrad: Midnight Hunt #296)
Village Watch // Village Reavers (Innistrad: Midnight Hunt #297)
Village Watch // Village Reavers (Innistrad: Midnight Hunt #297)
Bird Admirer // Wing Shredder (Innistrad: Midnight Hunt #298)
Bird Admirer // Wing Shredder (Innistrad: Midnight Hunt #298)
Burly Breaker // Dire-Strain Demolisher (Innistrad: Midnight Hunt #299)
Burly Breaker // Dire-Strain Demolisher (Innistrad: Midnight Hunt #299)
Dawnhart Mentor (Innistrad: Midnight Hunt #300)
Dawnhart Rejuvenator (Innistrad: Midnight Hunt #301)
Hound Tamer // Untamed Pup (Innistrad: Midnight Hunt #302)
Hound Tamer // Untamed Pup (Innistrad: Midnight Hunt #302)
Outland Liberator // Frenzied Trapbreaker (Innistrad: Midnight Hunt #303)
Outland Liberator // Frenzied Trapbreaker (Innistrad: Midnight Hunt #303)
Saryth, the Viper's Fang (Innistrad: Midnight Hunt #304)
Tireless Hauler // Dire-Strain Brawler (Innistrad: Midnight Hunt #305)
Tireless Hauler // Dire-Strain Brawler (Innistrad: Midnight Hunt #305)
Tovolar's Huntmaster // Tovolar's Packleader (Innistrad: Midnight Hunt #306)
Tovolar's Huntmaster // Tovolar's Packleader (Innistrad: Midnight Hunt #306)
Arlinn, the Pack's Hope // Arlinn, the Moon's Fury (Innistrad: Midnight Hunt #307)
Arlinn, the Pack's Hope // Arlinn, the Moon's Fury (Innistrad: Midnight Hunt #307)
Dawnhart Wardens (Innistrad: Midnight Hunt #308)
Katilda, Dawnhart Prime (Innistrad: Midnight Hunt #309)
Kessig Naturalist // Lord of the Ulvenwald (Innistrad: Midnight Hunt #310)
Kessig Naturalist // Lord of the Ulvenwald (Innistrad: Midnight Hunt #310)
Tovolar, Dire Overlord // Tovolar, the Midnight Scourge (Innistrad: Midnight Hunt #311)
Tovolar, Dire Overlord // Tovolar, the Midnight Scourge (Innistrad: Midnight Hunt #311)
Adeline, Resplendent Cathar (Innistrad: Midnight Hunt #312)
Lier, Disciple of the Drowned (Innistrad: Midnight Hunt #313)
Gisa, Glorious Resurrector (Innistrad: Midnight Hunt #314)
Jadar, Ghoulcaller of Nephalia (Innistrad: Midnight Hunt #315)
Jerren, Corrupted Bishop // Ormendahl, the Corrupter (Innistrad: Midnight Hunt #316)
Jerren, Corrupted Bishop // Ormendahl, the Corrupter (Innistrad: Midnight Hunt #316)
Dennick, Pious Apprentice // Dennick, Pious Apparition (Innistrad: Midnight Hunt #317)
Dennick, Pious Apprentice // Dennick, Pious Apparition (Innistrad: Midnight Hunt #317)
Florian, Voldaren Scion (Innistrad: Midnight Hunt #318)
Liesa, Forgotten Archangel (Innistrad: Midnight Hunt #319)
Ludevic, Necrogenius // Olag, Ludevic's Hubris (Innistrad: Midnight Hunt #320)
Ludevic, Necrogenius // Olag, Ludevic's Hubris (Innistrad: Midnight Hunt #320)
Old Stickfingers (Innistrad: Midnight Hunt #321)
Rem Karolus, Stalwart Slayer (Innistrad: Midnight Hunt #322)
Sigarda, Champion of Light (Innistrad: Midnight Hunt #323)
Slogurk, the Overslime (Innistrad: Midnight Hunt #324)
Vadrik, Astral Archmage (Innistrad: Midnight Hunt #325)

Though this query has ended, its relics still slumber in New Argive.