Blue fills the graveyard easily and has plenty of ways to help untap Emry to cast multiple artifacts each turn

Agatha's Soul Cauldron Agent of Erebos All Hallow's Eve Angel of Finality Angel of Glory's Rise Animate Graveyard Ascend from Avernus Bag of Holding Balthor the Defiled Barishi Bazaar of Wonders Bojuka Bog Burn Away Cabal Therapy Calix, Destiny's Hand Cease // Desist Counterbore Cranial Extraction Creeping Renaissance Crook of Condemnation Crypt Incursion Day's Undoing Deadly Cover-Up Death or Glory Descend upon the Sinful Doomsday Drudge Spell Duplicity Dusk // Dawn Elixir Endurance Epic Experiment Eradicate Extirpate Free-for-All Gamekeeper Gerrard's Hourglass Pendant Gerrard, Weatherlight Hero Ghastly Conscription Go Blank Gustha's Scepter Haunting Echoes Haunting Voyage Hazel's Brewmaster Hedonist's Trove Helvault Identity Crisis Idol of Endurance Ill-Gotten Gains Into the Earthen Maw Inverter of Truth Jund Charm Kaya's Guile Knowledge Vault Lantern of the Lost Legion's End Lobotomy Mairsil, the Pretender Metallurgic Summonings Moratorium Stone Myr Welder Necrogoyf Necromancer's Covenant Nicol Bolas, the Arisen Nihil Spellbomb Orzhova Paradigm Shift Patchwork Crawler Praetor's Counsel Purgatory

The Trouble with Tribals Grab your favorite creature typeit's time to talk about tribal decks
The holiday pun is applicable to everyone, but the rules text here isn't great for holiday anxiety (or present snooping), and it doesn't call back to an existing black-bordered card
And a box price that has climbed over 400% above MSRP since going out of print
While not as powerful, in a lot of ways, Judge's Familiar is a one-mana version of Thalia, Guardian of Thraben since opponents tend to play off-curve to avoid having an instant or sorcery countered by our one-drop flier