23 cards where (the card types include “instant” or the card types include “sorcery”) and the mana value >= 10

Apex of Power (Forgotten Realms Commander #114)
Blinkmoth Infusion (Fifth Dawn #25)
Blood for the Blood God! (Warhammer 40,000 Commander #108)
Commit // Memory (The Lost Caverns of Ixalan Commander #147)
Curse of the Cabal (Time Spiral #99)
Dead Drop (Khans of Tarkir #67)
Decree of Annihilation (Scourge #85)
Enter the Infinite (Gatecrash #34)
Eternal Dominion (Saviors of Kamigawa #36)
Everything Comes to Dust (Doctor Who #19)
Explosive Singularity (Kamigawa: Neon Dynasty #140)
Omniclown Colossus // Pie-roclasm (Unfinity #116)
Organic Extinction (Murders at Karlov Manor Commander #76)
Primal Surge (Avacyn Restored #189)
Rags // Riches (Amonkhet #222)
Rise of the Eldrazi (Commander Masters #716)
Soulscour (Darksteel #14)
Storm Herd (Kaldheim Commander #33)
Sway of the Stars (Betrayers of Kamigawa #54)
Temporal Trespass (Fate Reforged #55)
Time Stretch (Dominaria Remastered #69)
Volcanic Salvo (Core Set 2021 #172)
Who // What // When // Where // Why (Unsanctioned #75)

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