29 cards where the name includes “clock”

Armageddon Clock (Masters Edition IV #180)
Blood Clock (Saviors of Kamigawa #153)
Clocknapper (Unstable #29)
Clock of DOOOOOOOOOOOOM! (Unstable #142)
Clock of Omens (Magic 2013 #202)
Clockspinning (Time Spiral #53)
Clockwork Avian (Masters Edition IV #190)
Clockwork Beast (Masters Edition #153)
Clockwork Beetle (Mirrodin #153)
Clockwork Condor (Duel Decks: Elspeth vs. Tezzeret #50)
Clockwork Dragon (Mirrodin #155)
Clockwork Drawbridge (Dominaria United #13)
Clockwork Droid (Doctor Who #172)
Clockwork Fox (Commander Legends: Battle for Baldur's Gate #308)
Clockwork Gnomes (Masters Edition IV #191)
Clockwork Hydra (Time Spiral Remastered #264)
Clockwork Percussionist (Duskmourn: House of Horror #130)
Clockwork Servant (Throne of Eldraine #216)
Clockwork Steed (Masters Edition II #205)
Clockwork Swarm (Masters Edition IV #192)
Clockwork Vorrac (Mirrodin #156)
Grindclock (Magic 2015 #217)
Losheel, Clockwork Scholar (Commander Masters #38)
Midnight Clock (Outlaws of Thunder Junction Commander #100)
Overclocked Electromancer (Modern Horizons 3 Commander #58)
Rusko, Clockmaker (Mystery Booster 2 #263)
Simic Locket (Ravnica Allegiance #240)
Trenzalore Clocktower (Doctor Who #190)
Unwinding Clock (Commander 2018 #228)

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