23 cards where the card types include “legendary creature” and the colors is BGU and the mana cost is greater than or equal to {B}{G}{U}

Archelos, Lagoon Mystic (Dominaria United Commander #140)
Brokkos, Apex of Forever (Ikoria: Lair of Behemoths #179)
Damia, Sage of Stone (Commander Anthology Volume II #2)
Felix Five-Boots (Outlaws of Thunder Junction Commander #6)
Gonti, Canny Acquisitor (Outlaws of Thunder Junction Commander #1)
Henry Wu, InGen Geneticist (Jurassic World Collection #12)
Kadena, Slinking Sorcerer (Commander 2019 #45)
Leovold, Emissary of Trest (Ultimate Masters #202)
Muldrotha, the Gravetide (Double Masters 2022 #258)
Nashi, Illusion Gadgeteer (Alchemy: Outlaws of Thunder Junction #24)
Nashi, Moon's Legacy (March of the Machine: The Aftermath #39)
Nine-Fingers Keene (Commander Legends: Battle for Baldur's Gate #289)
Otrimi, the Ever-Playful (Commander 2020 #12)
Rayami, First of the Fallen (Commander 2019 #48)
Sidisi, Brood Tyrant (Khans of Tarkir #199y)
The Mimeoplasm (Outlaws of Thunder Junction Commander #234)
The Wise Mothman (Fallout #4)
Volrath, the Shapestealer (Commander 2019 #51)
Vorosh, the Hunter (Commander Anthology Volume II #3)
Xavier Sal, Infested Captain (The Lost Caverns of Ixalan Commander #14)
Yarok, the Desecrated (Core Set 2020 #220)
Zaxara, the Exemplary (Dominaria United Commander #176)
Zimone and Dina (March of the Machine #257)

It is the moment of discovery, the triumph of the mind, and the end of these results.