58 cards where the cards aren’t reprints and the card is tagged “gains-mm-counters”

Devoted Druid (Shadowmoor #110)
Glen Elendra Archmage (Eventide #22)
Puppeteer Clique (Shadowmoor #75)
Woodfall Primus (Shadowmoor #135)
Murderous Redcap (Shadowmoor #192)
River Kelpie (Shadowmoor #49)
Putrid Goblin (Modern Horizons #101)
Wickerbough Elder (Eventide #80)
Persistent Constrictor (Duskmourn: House of Horror Commander #22)
Carnifex Demon (Scars of Mirrodin #57)
Lesser Masticore (Modern Horizons #225)
Phyrexian Hydra (Mirrodin Besieged #85)
Kitchen Finks (Shadowmoor #229)
Cinderhaze Wretch (Shadowmoor #60)
Wingrattle Scarecrow (Shadowmoor #270)
Ammit Eternal (Hour of Devastation #57)
Dusk Urchins (Shadowmoor #65)
Barrenton Medic (Shadowmoor #4)
Thunderblust (Eventide #63)
Twilight Shepherd (Shadowmoor #25)
Grim Poppet (Shadowmoor #252)
Furystoke Giant (Shadowmoor #93)
Chainbreaker (Shadowmoor #249)
Aerie Ouphes (Eventide #65)
Rattleblaze Scarecrow (Shadowmoor #259)
Safehold Elite (Shadowmoor #239)
Serrated Biskelion (Weatherlight #156)
Lingering Tormentor (Eventide #36)
Leech Bonder (Shadowmoor #43)
Rendclaw Trow (Eventide #127)
Noxious Hatchling (Eventide #124)
Scuzzback Marauders (Shadowmoor #216)
Etched Monstrosity (New Phyrexia #135)
Deity of Scars (Eventide #118)
Kithkin Spellduster (Eventide #8)
Wicker Warcrawler (Shadowmoor #269)
Heartmender (Shadowmoor #228)
Restless Apparition (Eventide #94)
Patched Plaything (Duskmourn: House of Horror #24)
Grief Tyrant (Shadowmoor #189)
Obstinate Gargoyle (Modern Horizons 3 #195)
Canker Abomination (Eventide #115)
Grazing Kelpie (Eventide #153)
Aboroth (Weatherlight #117)
Morselhoarder (Shadowmoor #212)
Lichenthrope (Visions #112)
Belligerent Hatchling (Eventide #134)
Shrewd Hatchling (Eventide #112)
Voracious Hatchling (Eventide #97)
Sturdy Hatchling (Eventide #163)
Trapjaw Kelpie (Eventide #164)
Gravelgill Axeshark (Shadowmoor #164)
Magmaroth (Hour of Devastation #102)
Matopi Golem (Visions #150)
Hotheaded Giant (Eventide #57)
Bloodied Ghost (Eventide #83)
Segmented Wurm (Tempest #269)
Flavor Disaster (Mystery Booster 2 #338)

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