48 cards where the illustration contains “plane-of-mountain...”

Aggressive Instinct (Global Series Jiang Yanggu & Mu Yanling #34)
Ancestor Dragon (Global Series Jiang Yanggu & Mu Yanling #12)
Armored Whirl Turtle (Global Series Jiang Yanggu & Mu Yanling #7)
Breath of Fire (Global Series Jiang Yanggu & Mu Yanling #33)
Brilliant Plan (Global Series Jiang Yanggu & Mu Yanling #17)
Celestial Messenger (Core Set 2020 #287)
Cleansing Screech (Global Series Jiang Yanggu & Mu Yanling #37)
Cloak of Mists (Global Series Jiang Yanggu & Mu Yanling #13)
Colorful Feiyi Sparrow (Global Series Jiang Yanggu & Mu Yanling #2)
Confidence from Strength (Global Series Jiang Yanggu & Mu Yanling #35)
Dragon's Presence (Global Series Jiang Yanggu & Mu Yanling #16)
Drawn from Dreams (Core Set 2020 #56)
Drown in Shapelessness (Global Series Jiang Yanggu & Mu Yanling #15)
Earth-Origin Yak (Global Series Jiang Yanggu & Mu Yanling #9)
Earthshaking Si (Global Series Jiang Yanggu & Mu Yanling #31)
Feiyi Snake (Global Series Jiang Yanggu & Mu Yanling #24)
Ferocious Zheng (Global Series Jiang Yanggu & Mu Yanling #28)
Fire-Omen Crane (Global Series Jiang Yanggu & Mu Yanling #29)
Flood of Tears (Core Set 2020 #59)
Forest (Global Series Jiang Yanggu & Mu Yanling #40)
Giant Spider (Global Series Jiang Yanggu & Mu Yanling #27)
Good-Fortune Unicorn (Modern Horizons #201)
Hardened-Scale Armor (Global Series Jiang Yanggu & Mu Yanling #32)
Heavenly Qilin (Global Series Jiang Yanggu & Mu Yanling #6)
Island (Global Series Jiang Yanggu & Mu Yanling #21)
Jiang Yanggu (Global Series Jiang Yanggu & Mu Yanling #22)
Journey for the Elixir (Global Series Jiang Yanggu & Mu Yanling #36)
Leopard-Spotted Jiao (Global Series Jiang Yanggu & Mu Yanling #23)
Meandering River (Global Series Jiang Yanggu & Mu Yanling #19)
Moon-Eating Dog (Global Series Jiang Yanggu & Mu Yanling #10)
Mountain (Global Series Jiang Yanggu & Mu Yanling #39)
Mowu // Mowu (Global Series Jiang Yanggu & Mu Yanling #T1)
Mowu // Mowu (Global Series Jiang Yanggu & Mu Yanling #T1)
Mu Yanling (Global Series Jiang Yanggu & Mu Yanling #1)
Mystic Skyfish (Core Set 2021 #326)
Nine-Tail White Fox (Global Series Jiang Yanggu & Mu Yanling #8)
Plains (Global Series Jiang Yanggu & Mu Yanling #20)
Purple-Crystal Crab (Global Series Jiang Yanggu & Mu Yanling #3)
Qilin's Blessing (Global Series Jiang Yanggu & Mu Yanling #14)
Reckless Pangolin (Global Series Jiang Yanggu & Mu Yanling #26)
Rhythmic Water Vortex (Global Series Jiang Yanggu & Mu Yanling #18)
Sacred White Deer (Global Series Jiang Yanggu & Mu Yanling #25)
Screeching Phoenix (Global Series Jiang Yanggu & Mu Yanling #30)
Stormcloud Spirit (Global Series Jiang Yanggu & Mu Yanling #11)
Ten Wizards Mountain (March of the Machine Commander #66)
Timber Gorge (Global Series Jiang Yanggu & Mu Yanling #38)
Vivid Flying Fish (Global Series Jiang Yanggu & Mu Yanling #4)
Welkin Tern (Global Series Jiang Yanggu & Mu Yanling #5)
Yanling's Harbinger (Core Set 2020 #289)

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