Most played cards in UB OmniTell:

1 Decks
Omniscience
4 copies - 4 average
Ponder
4 copies - 4 average
Show and Tell
4 copies - 4 average
Thoughtseize
4 copies - 4 average
Force of Will
4 copies - 4 average
Brainstorm
4 copies - 4 average
Polluted Delta
4 copies - 4 average
Preordain
3 copies - 3 average
Ancient Tomb
3 copies - 3 average
Surgical Extraction
3 copies - 3 average
Cunning Wish
3 copies - 3 average
Flusterstorm
3 copies - 3 average
Underground Sea
3 copies - 3 average
Flooded Strand
2 copies - 2 average
Emrakul, the Aeons Torn
2 copies - 2 average
Boseiju, Who Shelters All
2 copies - 2 average
Echoing Truth
1 copies - 1 average
Skeletal Scrying
1 copies - 1 average
Eladamri's Call
1 copies - 1 average
Noxious Revival
1 copies - 1 average