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

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

The arc of my blade has carved a path of light to the end of these results.