37 cards where the set is “mkm” and the text includes “disguise”

Aurelia's Vindicator (Murders at Karlov Manor #4)
Defenestrated Phantom (Murders at Karlov Manor #11)
Essence of Antiquity (Murders at Karlov Manor #15)
Forum Familiar (Murders at Karlov Manor #16)
Museum Nightwatch (Murders at Karlov Manor #25)
Unyielding Gatekeeper (Murders at Karlov Manor #35)
Bubble Smuggler (Murders at Karlov Manor #41)
Coveted Falcon (Murders at Karlov Manor #48)
Exit Specialist (Murders at Karlov Manor #55)
Mistway Spy (Murders at Karlov Manor #65)
Alley Assailant (Murders at Karlov Manor #76)
Basilica Stalker (Murders at Karlov Manor #78)
Hunted Bonebrute (Murders at Karlov Manor #87)
Nightdrinker Moroii (Murders at Karlov Manor #96)
Bolrac-Clan Basher (Murders at Karlov Manor #112)
Concealed Weapon (Murders at Karlov Manor #117)
Expose the Culprit (Murders at Karlov Manor #124)
Fugitive Codebreaker (Murders at Karlov Manor #127)
Offender at Large (Murders at Karlov Manor #138)
Pyrotechnic Performer (Murders at Karlov Manor #140)
Culvert Ambusher (Murders at Karlov Manor #158)
Flourishing Bloom-Kin (Murders at Karlov Manor #160)
Greenbelt Radical (Murders at Karlov Manor #163)
Nervous Gardener (Murders at Karlov Manor #169)
Vengeful Creeper (Murders at Karlov Manor #182)
Crowd-Control Warden (Murders at Karlov Manor #193)
Dog Walker (Murders at Karlov Manor #197)
Faerie Snoop (Murders at Karlov Manor #203)
Gadget Technician (Murders at Karlov Manor #204)
Granite Witness (Murders at Karlov Manor #206)
Rakish Scoundrel (Murders at Karlov Manor #225)
Riftburst Hellion (Murders at Karlov Manor #228)
Sanguine Savior (Murders at Karlov Manor #230)
Shady Informant (Murders at Karlov Manor #231)
Undercover Crocodelf (Murders at Karlov Manor #239)
Lumbering Laundry (Murders at Karlov Manor #253)
Branch of Vitu-Ghazi (Murders at Karlov Manor #258)

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