Most played cards in Omnath, Locus of Mana:

3 Decks
Llanowar Elves
3 copies - 1 average
Green Sun's Zenith
3 copies - 1 average
Joraga Treespeaker
3 copies - 1 average
Garruk Wildspeaker
3 copies - 1 average
Wood Elves
3 copies - 1 average
Sylvan Library
3 copies - 1 average
Priest of Titania
3 copies - 1 average
Wild Growth
3 copies - 1 average
Reclamation Sage
3 copies - 1 average
Surrak, the Hunt Caller
3 copies - 1 average
Primeval Titan
3 copies - 1 average
Scavenging Ooze
3 copies - 1 average
Fyndhorn Elves
3 copies - 1 average
Arbor Elf
3 copies - 1 average
Birds of Paradise
3 copies - 1 average
Acidic Slime
3 copies - 1 average
Nykthos, Shrine to Nyx
3 copies - 1 average
Chord of Calling
3 copies - 1 average
Fauna Shaman
3 copies - 1 average
Boreal Druid
3 copies - 1 average