Most played cards in Hive Mind Combo:

1 Decks
Ponder
4 copies - 4 average
Pact of the Titan
4 copies - 4 average
Ancient Tomb
4 copies - 4 average
Show and Tell
4 copies - 4 average
Leyline of Sanctity
4 copies - 4 average
Hive Mind
4 copies - 4 average
Force of Will
4 copies - 4 average
Pact of Negation
4 copies - 4 average
Brainstorm
4 copies - 4 average
Polluted Delta
4 copies - 4 average
Grim Monolith
3 copies - 3 average
Flooded Strand
3 copies - 3 average
Pyroclasm
3 copies - 3 average
Gitaxian Probe
3 copies - 3 average
Emrakul, the Aeons Torn
3 copies - 3 average
City of Traitors
2 copies - 2 average
Volcanic Island
2 copies - 2 average
Grafdigger's Cage
1 copies - 1 average
Pyroblast
1 copies - 1 average
Relic of Progenitus
1 copies - 1 average