40 cards where the set is “cmm” and (the collector number >= 704 and the collector number <= 743)

Zhulodok, Void Gorger (Commander Masters #704)
Anikthea, Hand of Erebos (Commander Masters #705)
Commodore Guff (Commander Masters #706)
Sliver Gravemother (Commander Masters #707)
Omarthis, Ghostfire Initiate (Commander Masters #708)
Leori, Sparktouched Hunter (Commander Masters #709)
Narci, Fable Singer (Commander Masters #710)
Rukarumel, Biologist (Commander Masters #711)
Abstruse Archaic (Commander Masters #712)
Calamity of the Titans (Commander Masters #713)
Desecrate Reality (Commander Masters #714)
Flayer of Loyalties (Commander Masters #715)
Rise of the Eldrazi (Commander Masters #716)
Skittering Cicada (Commander Masters #717)
Ugin's Mastery (Commander Masters #718)
Battle at the Helvault (Commander Masters #719)
Boon of the Spirit Realm (Commander Masters #720)
Gatewatch Beacon (Commander Masters #721)
Onakke Oathkeeper (Commander Masters #722)
Ondu Spiritdancer (Commander Masters #723)
Regal Sliver (Commander Masters #724)
Teyo, Geometric Tactician (Commander Masters #725)
Sparkshaper Visionary (Commander Masters #726)
Taunting Sliver (Commander Masters #727)
Titan of Littjara (Commander Masters #728)
Vronos, Masked Inquisitor (Commander Masters #729)
Cacophony Unleashed (Commander Masters #730)
Demon of Fate's Design (Commander Masters #731)
Ghoulish Impetus (Commander Masters #732)
Lazotep Sliver (Commander Masters #733)
Capricious Sliver (Commander Masters #734)
Chandra, Legacy of Fire (Commander Masters #735)
Descendants' Fury (Commander Masters #736)
Guff Rewrites History (Commander Masters #737)
Jaya's Phoenix (Commander Masters #738)
Composer of Spring (Commander Masters #739)
For the Ancestors (Commander Masters #740)
Hatchery Sliver (Commander Masters #741)
Nyxborn Behemoth (Commander Masters #742)
Darksteel Monolith (Commander Masters #743)

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