28 cards where the card types include “instant” and the card types include “sorcery”

Carnival // Carnage (Ravnica Allegiance #222)
Cease // Desist (Murders at Karlov Manor #246)
Commit // Memory (The Lost Caverns of Ixalan Commander #147)
Consecrate // Consume (Ravnica Allegiance #224)
Consign // Oblivion (Hour of Devastation #149)
Destined // Lead (Amonkhet #217)
Discovery // Dispersal (Ravnica: Clue Edition #187)
Failure // Comply (Amonkhet #221)
Farm // Market (Commander 2019 #192)
Fast // Furious (Modern Horizons 2 #123)
Flotsam // Jetsam (Murders at Karlov Manor #247)
Fuss // Bother (Murders at Karlov Manor #248)
Heaven // Earth (Outlaws of Thunder Junction Commander #230)
Hustle // Bustle (Murders at Karlov Manor #249)
Incubation // Incongruity (Ravnica: Clue Edition #197)
Leave // Chance (Hour of Devastation #153)
Onward // Victory (Amonkhet #218)
Prepare // Fight (Amonkhet #220)
Reduce // Rubble (Amonkhet #216)
Repudiate // Replicate (Ravnica Remastered #249)
Response // Resurgence (Ravnica Remastered #247)
Road // Ruin (Modern Horizons 2 #212)
Said // Done (Modern Horizons 2 #60)
Spring // Mind (Amonkhet #219)
Start // Finish (Amonkhet #215)
Struggle // Survive (March of the Machine Commander #339)
Thrash // Threat (Ravnica Remastered #246)
Warrant // Warden (Ravnica Remastered #240)

The message was clear to Sorin—time to search for something else.