15 cards where the cards are split and the color identity ≤ RW

Boom // Bust (Time Spiral Remastered #156)
Coward // Killer (Doctor Who #77)
Dead // Gone (Time Spiral Remastered #161)
Dusk // Dawn (Murders at Karlov Manor Commander #61)
Fast // Furious (Modern Horizons 2 #123)
Gallifrey Falls // No More (Doctor Who #131)
Indulge // Excess (New Capenna Commander #46)
Insult // Injury (Amonkhet #213)
Integrity // Intervention (Ravnica: Clue Edition #198)
Leave // Chance (Hour of Devastation #153)
Onward // Victory (Amonkhet #218)
Order // Chaos (Dominaria Remastered #212)
Response // Resurgence (Ravnica Remastered #247)
Rough // Tumble (Time Spiral Remastered #186)
Wear // Tear (March of the Machine Commander #343)

Though this query has ended, its relics still slumber in New Argive.