41 cards where the set is “pktk” and the cards are cards with a date stamp

Abzan Ascendancy (Khans of Tarkir Promos #160s)
Anafenza, the Foremost (Khans of Tarkir Promos #163s)
Ankle Shanker (Khans of Tarkir Promos #164s)
Avalanche Tusker (Khans of Tarkir Promos #166s)
Bloodsoaked Champion (Khans of Tarkir Promos #66s)
Butcher of the Horde (Khans of Tarkir Promos #168s)
Crackling Doom (Khans of Tarkir Promos #171s)
Crater's Claws (Khans of Tarkir Promos #106s)
Deflecting Palm (Khans of Tarkir Promos #173s)
Dig Through Time (Khans of Tarkir Promos #36s)
Dragon-Style Twins (Khans of Tarkir Promos #108s)
Dragon Throne of Tarkir (Khans of Tarkir Promos #219)
Duneblast (Khans of Tarkir Promos #174s)
Flying Crane Technique (Khans of Tarkir Promos #176s)
Grim Haruspex (Khans of Tarkir Promos #73s)
Hardened Scales (Khans of Tarkir Promos #133s)
Herald of Anafenza (Khans of Tarkir Promos #12s)
High Sentinels of Arashin (Khans of Tarkir Promos #13s)
Icy Blast (Khans of Tarkir Promos #42s)
Ivorytusk Fortress (Khans of Tarkir Promos #179s)
Jeering Instigator (Khans of Tarkir Promos #113s)
Jeskai Ascendancy (Khans of Tarkir Promos #180s)
Kheru Lich Lord (Khans of Tarkir Promos #182s)
Mardu Ascendancy (Khans of Tarkir Promos #185s)
Master of Pearls (Khans of Tarkir Promos #18s)
Narset, Enlightened Master (Khans of Tarkir Promos #190s)
Necropolis Fiend (Khans of Tarkir Promos #82s)
Rakshasa Vizier (Khans of Tarkir Promos #193s)
Rattleclaw Mystic (Khans of Tarkir Promos #144s)
Sage of the Inward Eye (Khans of Tarkir Promos #195s)
Sidisi, Brood Tyrant (Khans of Tarkir Promos #199s)
Siege Rhino (Khans of Tarkir Promos #200s)
Sultai Ascendancy (Khans of Tarkir Promos #203s)
Surrak Dragonclaw (Khans of Tarkir Promos #206s)
Temur Ascendancy (Khans of Tarkir Promos #207s)
Thousand Winds (Khans of Tarkir Promos #58s)
Trail of Mystery (Khans of Tarkir Promos #154s)
Trap Essence (Khans of Tarkir Promos #209s)
Utter End (Khans of Tarkir Promos #210s)
Villainous Wealth (Khans of Tarkir Promos #211s)
Zurgo Helmsmasher (Khans of Tarkir Promos #214s)

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