Most played cards in Slag Fiend Red:

1 Decks
Galvanic Blast
4 copies - 4 average
Panic Spellbomb
4 copies - 4 average
Arc Trail
4 copies - 4 average
Ratchet Bomb
4 copies - 4 average
Koth of the Hammer
4 copies - 4 average
Mycosynth Wellspring
4 copies - 4 average
Ichor Wellspring
4 copies - 4 average
Slag Fiend
4 copies - 4 average
Kuldotha Phoenix
4 copies - 4 average
Vulshok Replica
4 copies - 4 average
Oxidda Scrapmelter
4 copies - 4 average
Iron Myr
4 copies - 4 average
Phyrexia's Core
4 copies - 4 average
Act of Aggression
3 copies - 3 average
Red Sun's Zenith
3 copies - 3 average