1-36 of 44 cards where the cost is equal to 3 and (the region is Piltover & Zaun or the region is Noxus)

Amateur Aeronaut
Arachnoid Sentry
Assembly Bot
Crimson Curator
Culling Strike
Death Ray - Mk 3
Death's Hand
Draven
Draven
Draven's Whirling Death
Ezreal
Ezreal
Flash of Brilliance
Get Excited!
Golden Crushbot
Hexcore Foundry
Iron Ballista
Jinx's Get Excited!
Katarina
LeBlanc
LeBlanc
Legion Marauder
Might
Mimic
Mk3: Apex Turret
Noxian Fervor
Noxian Guillotine
Nyandroid
Parade Electrorig
Patrol Wardens
Puffcap Peddler
Reckless Trifarian
Rising Spell Force
Riven
Riven
Scorched Earth