Most played cards in Helm Combo:

1 Decks
Ancient Tomb
4 copies – 4 avg
Dark Ritual
4 copies – 4 avg
Karn, the Great Creator
4 copies – 4 avg
City of Traitors
4 copies – 4 avg
Chrome Mox
4 copies – 4 avg
Leyline of the Void
4 copies – 4 avg
Agadeem's Awakening
4 copies – 4 avg
Helm of Obedience
4 copies – 4 avg
Opposition Agent
4 copies – 4 avg
Orcish Bowmasters
4 copies – 4 avg
Dauthi Voidwalker
4 copies – 4 avg
Thoughtseize
3 copies – 3 avg
The One Ring
3 copies – 3 avg
Grief
3 copies – 3 avg
Sheoldred, the Apocalypse
2 copies – 2 avg
Plague Engineer
2 copies – 2 avg
Liquimetal Coating
1 copies – 1 avg
Trinisphere
1 copies – 1 avg
Ensnaring Bridge
1 copies – 1 avg
Faerie Macabre
1 copies – 1 avg