12 cards where the card has the keyword “Jump-start”

Beacon Bolt (Guilds of Ravnica #154)
Chemister's Insight (Ravnica: Clue Edition #81)
Dihada's Ploy (Modern Horizons 2 #193)
Direct Current (Ravnica: Clue Edition #132)
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)

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