The secrets he uncovers lead him to Nahiri's terrifying plan to bring Emrakul to Innistrad

Abdel Adrian, Gorion's Ward Achilles Davenport Acolyte of Bahamut Agent of the Iron Throne Agent of the Shadow Thieves Ainok Strike Leader Akroma's Will Akroma's Will Alora, Merry Thief Amber Gristle O'Maul Aminatou, the Fateshifter Ancestral Communion Angelic Field Marshal Archivist of Gondor Astarion's Thirst Baeloth Barrityl, Entertainer Bane's Contingency Bastion Protector Benalish Commander Biowaste Blob Bloodsworn Steward Brotherhood Ambushers Burakos, Party Leader Candlekeep Sage Captain Vargus Wrath Chain Assassination Clan Crafter Clara Oswald Cloakwood Hermit Cloudkill Command Beacon Command Beacon Commander Greven il-Vec Commander Sofia Daguerre Commander's Insight Commander's Insignia Commander's Plate Commodore Guff Company Commander Convergence of Dominion Criminal Past Crimson Honor Guard Cultist of the Absolute Daretti, Scrap Savant Deadly Rollick Deflecting Swat Demon of Wailing Agonies Dihada, Binder of Wills Distract the Guards Dragon Cultist Drillworks Mole Drown in Dreams Dungeon Delver Durnan of the Yawning Portal Eagle Vision Echo Storm Ellyn Harbreeze, Busybody Elminster Empyrial Storm Endless Ranks of HYDRA Erinis, Gloom Stalker Escape Detection Estrid, the Masked Everett K

Umbra armor's effect is mandatory
Sending out pokemon birthday cards is a great way to kick off the festivities and get everyone in the mood for a pokemon adventure
For how much Garfield and Magics other core designers didnt yet understand about the future of the game, the reasoning for this was simple, and showed a tremendous amount of foresight: adding more and more cards to a single card pool would, in Garfields own words, collapse the game into complexity and would strongarm players into buying cards they might not want. Hmm