34 cards where (the card types include “elk” or the text includes “elk token creature”) and it’s legal in Commander

Auspicious Starrix (Ikoria: Lair of Behemoths #144)
Axebane Stag (Return to Ravnica #116)
Bellowing Elk (Modern Horizons #157)
Beza, the Bounding Spring (Bloomburrow #2)
Burnished Hart (Foundations #250)
Dawnglade Regent (Commander Legends #222)
Dawntreader Elk (Jumpstart #387)
Enduring Vitality (Duskmourn: House of Horror #176)
Ethereal Elk (Core Set 2020 #299)
Fey Steed (Forgotten Realms Commander #5)
Galewind Moose (Bloomburrow #173)
Gang of Elk (Seventh Edition #247)
Glimmerpoint Stag (Eternal Masters #12)
Golden Hind (Journey into Nyx #124)
Great Hart (Born of the Gods #15)
Great Sable Stag (Magic 2010 #186)
Heliod's Emissary (Theros #18)
Highland Game (Core Set 2019 #188)
Jegantha, the Wellspring (Ikoria: Lair of Behemoths #222)
Mirkwood Elk (Tales of Middle-earth Commander #41)
Rimefur Reindeer (Wilds of Eldraine #27)
Sacred White Deer (Global Series Jiang Yanggu & Mu Yanling #25)
Saddled Rimestag (Modern Horizons #177)
Somberwald Stag (Jumpstart #431)
Splendor Mare (Ikoria: Lair of Behemoths #32)
Springmane Cervin (Strixhaven: School of Mages #144)
Stampeding Elk Herd (Dragons of Tarkir #208)
Star-Crowned Stag (Core Set 2019 #38)
Tempest Hart // Scan the Clouds (Wilds of Eldraine #238)
The Pride of Hull Clade (Murders at Karlov Manor #172)
Trickster's Elk (Modern Horizons 3 #175)
Vernal Sovereign (Ravnica: Clue Edition #51)
Watchful Radstag (Fallout #87)
Wetland Sambar (Khans of Tarkir #62)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.