15 cards where the text includes “affinity” and it’s legal in Pauper and the card is the first printing and the colors ≤ UW

Dross Golem (Darksteel #119)
Frogmite (Mirrodin #172)
Into Thin Air (Fifth Dawn #33)
Lens Flare (Modern Horizons 2 #20)
Myr Enforcer (Mirrodin #211)
Oxidda Golem (Darksteel #135)
Quicksilver Behemoth (Darksteel #30)
Razor Golem (Darksteel #137)
Scale of Chiss-Goria (Mirrodin #236)
Somber Hoverguard (Mirrodin #51)
Spire Golem (Darksteel #145)
Steelfin Whale (Modern Horizons 2 #65)
Tangle Golem (Darksteel #151)
Thoughtcast (Mirrodin #54)
Tooth of Chiss-Goria (Mirrodin #264)

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