15 cards where the flavor text contains “designed” and the set is “m15”

Aggressive Mining (Magic 2015 #127)
Avarice Amulet (Magic 2015 #212)
Chasm Skulker (Magic 2015 #46)
Cruel Sadist (Magic 2015 #93)
Genesis Hydra (Magic 2015 #176)
Goblin Kaboomist (Magic 2015 #144)
Hot Soup (Magic 2015 #219)
Master of Predicaments (Magic 2015 #67)
Ob Nixilis, Unshackled (Magic 2015 #110)
Shield of the Avatar (Magic 2015 #230)
Spirit Bonds (Magic 2015 #37)
Warden of the Beyond (Magic 2015 #42)
Waste Not (Magic 2015 #122)
Xathrid Slyblade (Magic 2015 #124)
Yisan, the Wanderer Bard (Magic 2015 #209)

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