12 cards where the text includes “jump-start” and the color identity ≤ RUW

Beacon Bolt (Guilds of Ravnica #154)
Chemister's Insight (Ravnica: Clue Edition #81)
Direct Current (Ravnica: Clue Edition #132)
Filigree Racer (Modern Horizons 3 Commander #56)
Gravitic Punch (Guilds of Ravnica #105)
Maximize Altitude (Guilds of Ravnica #43)
Maximize Velocity (Guilds of Ravnica #111)
Quasiduplicate (Ravnica Remastered #55)
Radical Idea (Outlaws of Thunder Junction Commander #110)
Risk Factor (Guilds of Ravnica #113)
Sonic Assault (Guilds of Ravnica #199)
Start the TARDIS (Doctor Who #56)

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