14 cards where the cards aren’t reprints and the card has the keyword “Transmute”

Muddle the Mixture (Ravnica: City of Guilds #60)
Tolaria West (Future Sight #173)
Drift of Phantasms (Ravnica: City of Guilds #46)
Dimir Infiltrator (Ravnica: City of Guilds #203)
Dimir House Guard (Ravnica: City of Guilds #83)
Perplex (Ravnica: City of Guilds #217)
Shred Memory (Ravnica: City of Guilds #105)
Dizzy Spell (Ravnica: City of Guilds #43)
Dimir Machinations (Ravnica: City of Guilds #84)
Brainspoil (Ravnica: City of Guilds #78)
Clutch of the Undercity (Ravnica: City of Guilds #197)
Netherborn Phalanx (Ravnica: City of Guilds #99)
Grozoth (Ravnica: City of Guilds #53)
Ethereal Usher (Ravnica: City of Guilds #47)

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