13 cards where the text includes “strive” and the color identity ≤ RUW

Aerial Formation (Journey into Nyx #30)
Ajani's Presence (Journey into Nyx #2)
Blinding Flare (Journey into Nyx #91)
Call the Coppercoats (New Capenna Commander #195)
Desperate Stand (Journey into Nyx #147)
Harness by Force (Journey into Nyx #100)
Hour of Need (Journey into Nyx #40)
Kiora's Dismissal (Journey into Nyx #44)
Launch the Fleet (Journey into Nyx #15)
Phalanx Formation (Journey into Nyx #21)
Polymorphous Rush (Journey into Nyx #46)
Rouse the Mob (Journey into Nyx #109)
Twinflame (Double Masters 2022 #129)

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