This is a brand new cube!
Azorius: Foretell/Spirits
Daxos of Meletis, Ranar, the Ever-Watchful, and Vega, the Watcher

Dimir: Unblockable Sneaky Bois
Krydle of Baldur's Gate, Vela the Night-Clad, and Phoebe, Head of S.N.E.A.K.

Izzet: Spellslinger (Sorry not much room to work here)
Melek, Izzet Paragon, Vadrik, Astral Archmage, Rootha, Mercurial Artist

Simic: Big Copied Creatures
Esix, Fractal Bloom, Volo, Guide to Monsters, Lonis, Cryptozoologist

Selesnyan: Human Tribal??
Kyler, Sigardian Emissary, Leinore, Autumn Sovreign, Torens, Fist of the Angels

Boros: Spirit Beats
Hofri Ghostforge, Quintorius, Field Historian, Bell Borca, Spectral Sergeant

Orzhov: Human Aristocrats
Killian, Ink Duelist, Aryel, Knight of Windgrace]], General Kudro of Drannith

Golgari: Reanimator
Old Rustein, Sapling of Colfenor, Storrev, Devkarin Lich

Rakdos: Group Slug/Sac
Tymaret, The Murder King, Judith, the Scourage Diva, Juri, Master of the Revue.

Gruul: Big and Tall
Wulfgar of Icewind Dale, Halana and Alena, Partners, Tuya Bearclaw

Abzan: Creature Recurison Colfenor, the Last Yew
Grixis: Spellslinger [Kess, Dissident Mage]]

Bant: Creature Value
Amareth, the Lustrous

Esper: Stealing Shenanigans Nihiloor

Jeskai: Narset, Enlightened Master

Jund: Sek'Kuar, Deathkeeper

Mardu: Human Tribal Jirina Kudro

Naya: Monarchy Jared Carthalion, True Heir

Sultai: Copy the big bois Volrath, the Shapestealer

Temur: Attack Exile Intet, the Dreamer