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

Boom // Bust (PLC)
Dead // Gone (PLC)
Dusk // Dawn (C19)
Insult // Injury (AKH)
Integrity // Intervention (GRN)
Leave // Chance (HOU)
Onward // Victory (AKH)
Order // Chaos (C16)
Response // Resurgence (GRN)
Rough // Tumble (C13)
Start // Fire (CMB1)
Wear // Tear (DGM)

This search is finished. Now the real work can begin.