5 cards where the mana cost is equal to {R/W}

Boros Recruit (Ravnica: City of Guilds #243)
Duergar Assailant (Eventide #136)
Figure of Destiny (Double Masters 2022 #213)
Integrity // Intervention (Ravnica: Clue Edition #198)
Make Your Mark (Strixhaven: School of Mages #204)

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