36 cards where the number of colors is 5 and the card types include “creature”

Atogatog (Odyssey #286)
Child of Alara (Double Masters 2022 #192)
Chromanticore (Dominaria United Commander #146)
Cromat (Apocalypse #94)
Esika, God of the Tree // The Prismatic Bridge (Kaldheim #168)
Esika, God of the Tree // The Prismatic Bridge (Kaldheim #168)
Fallaji Wayfarer (Dominaria United Commander #11)
Fusion Elemental (Dominaria United Commander #150)
Garth One-Eye (Modern Horizons 2 #197)
Horde of Notions (Modern Masters 2015 #178)
Jodah, the Unifier (Dominaria United #203)
Karona, False God (Scourge #138)
Maelstrom Archangel (Dominaria United Commander #158)
Marina Vendrell (Duskmourn: House of Horror #221)
Niv-Mizzet, Guildpact (Murders at Karlov Manor #220)
Niv-Mizzet Reborn (War of the Spark #208)
Niv-Mizzet, Supreme (March of the Machine: The Aftermath #40)
O-Kagachi, Vengeful Kami (Dominaria United Commander #164)
Omnath, Locus of All (March of the Machine #249)
Primeval Spawn (Dominaria United Commander #13)
Progenitus (Foundations #244)
Reaper King (Shadowmoor #260)
Rukarumel, Biologist (Commander Masters #711)
Scion of the Ur-Dragon (Commander 2017 #192)
Sliver Gravemother (Commander Masters #707)
Sliver Hivelord (Commander Masters #937)
Sliver Legion (Time Spiral Remastered #261)
Sliver Overlord (Scourge #139)
Sliver Queen (Tempest Remastered #211)
Sphinx of the Guildpact (Double Masters #290)
The First Sliver (Modern Horizons #200)
The Kami War // O-Kagachi Made Manifest (Kamigawa: Neon Dynasty #227)
The Kami War // O-Kagachi Made Manifest (Kamigawa: Neon Dynasty #227)
The Ur-Dragon (Commander Masters #361)
Tiamat (Adventures in the Forgotten Realms #235)
Tom Bombadil (The Lord of the Rings: Tales of Middle-earth #234)
Transguild Courier (Dominaria United Commander #194)
Two-Headed Hellkite (Dominaria United Commander #14)

In the blink of an eye, they strode from deep snow to the end of this search.