While it remains to be seen if his mana cost and his needing to tap to perform most of the best artifact combos make him too slow for cEDH, he should get up to some good fun in this precon with all of the different artifacts and his Prismatic Gallery ability
How To Tell If A Pack Is A Box Topper
The answer: make a five-color battle or a colorless one
The first copy is likely quite strong, but I dont think you can afford to put too many of it into your deck

Release date: 2021-01-06 Axgard Braggart Battershield Warrior Battlefield Raptor Beskir Shieldmate Bound in Gold Clarion Spirit Codespell Cleric Divine Gambit Doomskar Doomskar Oracle Giant Ox Glorious Protector Gods' Hall Guardian Goldmaw Champion Halvar, God of Battle Sword of the Realms Invoke the Divine Iron Verdict Kaya's Onslaught Master Skald Rally the Ranks Reidane, God of the Worthy Valkmira, Protector's Shield Resplendent Marshal Revitalize Righteous Valkyrie Rune of Sustenance Runeforge Champion Search for Glory Shepherd of the Cosmos Sigrid, God-Favored Spectral Steel Stalwart Valkyrie Starnheim Courser Starnheim Unleashed Story Seeker Usher of the Fallen Valkyrie's Sword Valor of the Worthy Warhorn Blast Wings of the Cosmos Alrund, God of the Cosmos Hakka, Whispering Raven Alrund's Epiphany Annul Ascendant Spirit Augury Raven Avalanche Caller Behold the Multiverse Berg Strider Bind the Monster Brinebarrow Intruder Cosima, God of the Voyage The Omenkeel Cosmos Charger Cyclone Summoner Depart the Realm Disdainful Stroke Draugr Thought-Thief Frost Augur Frostpeak Yeti Frostpyre Arcanist Giant's Amulet Glimpse the Cosmos Graven Lore Icebind Pillar Icebreaker Kraken Inga Rune-Eyes Karfell Harbinger Littjara Kinseekers Mists of Littjara Mistwalker
