47 cards where the colors ≥ BGRUW and it’s legal in Commander

Niv-Mizzet, Guildpact (Murders at Karlov Manor #220)
Leyline of the Guildpact (Murders at Karlov Manor #217)
Sliver Hivelord (Commander Masters #937)
Rukarumel, Biologist (Commander Masters #711)
Sliver Gravemother (Commander Masters #707)
The Ur-Dragon (Commander Masters #361)
Tom Bombadil (The Lord of the Rings: Tales of Middle-earth #234)
Niv-Mizzet, Supreme (March of the Machine: The Aftermath #40)
Omnath, Locus of All (March of the Machine #249)
Invasion of Alara // Awaken the Maelstrom (March of the Machine #230)
Invasion of Alara // Awaken the Maelstrom (March of the Machine #230)
Begin the Invasion (March of the Machine Commander #79)
Jodah, the Unifier (Dominaria United #203)
Transguild Courier (Dominaria United Commander #194)
O-Kagachi, Vengeful Kami (Dominaria United Commander #164)
Maelstrom Nexus (Dominaria United Commander #159)
Maelstrom Archangel (Dominaria United Commander #158)
Fusion Elemental (Dominaria United Commander #150)
Chromanticore (Dominaria United Commander #146)
Unite the Coalition (Dominaria United Commander #15)
Two-Headed Hellkite (Dominaria United Commander #14)
Primeval Spawn (Dominaria United Commander #13)
Iridian Maelstrom (Dominaria United Commander #12)
Fallaji Wayfarer (Dominaria United Commander #11)
Jared Carthalion (Dominaria United Commander #2)
Child of Alara (Double Masters 2022 #192)
Meeting of the Five (Streets of New Capenna #202)
The Kami War // O-Kagachi Made Manifest (Kamigawa: Neon Dynasty #227)
The Kami War // O-Kagachi Made Manifest (Kamigawa: Neon Dynasty #227)
Tiamat (Adventures in the Forgotten Realms #235)
Garth One-Eye (Modern Horizons 2 #197)
Sliver Legion (Time Spiral Remastered #261)
Esika, God of the Tree // The Prismatic Bridge (Kaldheim #168)
Esika, God of the Tree // The Prismatic Bridge (Kaldheim #168)
Sphinx of the Guildpact (Double Masters #290)
Sanctum of All (Core Set 2021 #225)
The First Sliver (Modern Horizons #200)
Niv-Mizzet Reborn (War of the Spark #208)
Conflux (Masters 25 #202)
Scion of the Ur-Dragon (Commander 2017 #192)
Last Stand (Planechase Anthology #100)
Horde of Notions (Modern Masters 2015 #178)
Sliver Queen (Tempest Remastered #211)
Progenitus (Modern Masters #182)
Reaper King (Shadowmoor #260)
Genju of the Realm (Betrayers of Kamigawa #151)
Sliver Overlord (Scourge #139)
Karona, False God (Scourge #138)
Atogatog (Odyssey #286)
Cromat (Apocalypse #94)

This search is finished. Now the real work can begin.