mtg deck contains cards not in your collection Arena Reprint and Card Style Improvements and jump straight into the action with a Secrets of Strixhaven Commander Deck MTG Mystery Booster playtest cards

Yes, much of that excitement comes from Pioneer, where Kaheera is a card that Cat Tribal is BEGGING for and probably makes the kitties a very good tribe in that format

Why not pick one up and see for yourself

Is this a bad thing

Advanced Search Sets Random Syntax Abandon the Post Abandoned Sarcophagus Abhorrent Oculus Abomination, World Ravager Abstract Performance Acorn Harvest Advanced Reconstruction Aetherworks Marvel Aggressive Symbiosis Alex Wilder, Runaway Alien Symbiosis Altar of Bhaal Altar of Bhaal Altar of the Lost Alter Reality Analyze the Pollen Ancestral Communion Ancestral Tribute Ancient Grudge Angelfire Ignition Annie Flash, the Veteran Anrakyr the Traveller Anti-Venom, Horrifying Healer Antiquities on the Loose Appeal // Authority Appeal // Authority Aquatic Alchemist Aquatic Alchemist Arcade Gannon Arcane Bombardment Arcane Infusion Arcane Proxy Archfiend's Vessel Archmage's Newt Arclight Phoenix Army of the Damned Arrogant Wurm Artful Dodge Artisan of Kozilek Astelli Reclaimer Auron's Inspiration Aurora Eidolon Aurora Phoenix Azula, Cunning Usurper Back for Seconds Back from the Brink Baithook Angler Balduvian Atrocity Banon, the Returners' Leader Baron Helmut Zemo Bash to Bits Basking Rootwalla Battle Screech Bazaar of Baghdad Beacon Bolt Beast Attack Behind the Mask Beloved Beggar Bind to Secrecy Binding Geist Bite Down on Crime Blood Beckoning Blood for Bones Blood on the Snow Bloodbraid Challenger Bloodbraid Marauder Bloodline Bidding Bloodthirsty Adversary Bloodwater Entity Boneyard Lurker Breaking // Entering Breaking // Entering

Marketing gimmicks are fine, but Wizards should know better than to act like sticking unique Secret Lair cards on "The List" is going to solve potential supply issues or do much to minimize the risk of printing unique cards in time-limited, potentially low-supply products