28 cards where the rarity is equal to common and the set is “ima” and the cards were printed at a new rarity

Angel of Mercy (Iconic Masters #6)
Crowned Ceratok (Iconic Masters #158)
Darksteel Axe (Iconic Masters #214)
Dissolve (Iconic Masters #51)
Draconic Roar (Iconic Masters #123)
Dragonlord's Servant (Iconic Masters #126)
Duskdale Wurm (Iconic Masters #161)
Earth Elemental (Iconic Masters #127)
Emerge Unscathed (Iconic Masters #19)
Foul-Tongue Invocation (Iconic Masters #91)
Furnace Whelp (Iconic Masters #129)
Guardian Idol (Iconic Masters #216)
Ivy Elemental (Iconic Masters #170)
Jace's Phantasm (Iconic Masters #60)
Jaddi Offshoot (Iconic Masters #171)
Jhessian Thief (Iconic Masters #61)
Lead the Stampede (Iconic Masters #173)
Mark of Mutiny (Iconic Masters #139)
Prey's Vengeance (Iconic Masters #182)
Riverwheel Aerialists (Iconic Masters #71)
Scion of Ugin (Iconic Masters #1)
Seeker of the Way (Iconic Masters #29)
Star Compass (Iconic Masters #229)
Survival Cache (Iconic Masters #34)
Sustainer of the Realm (Iconic Masters #35)
Thrill-Kill Assassin (Iconic Masters #111)
Virulent Swipe (Iconic Masters #113)
Wight of Precinct Six (Iconic Masters #114)

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