Most played cards in Oath of Druids:

2 Decks
Pyroblast
8 copies - 4 average
Oath of Druids
8 copies - 4 average
Preordain
8 copies - 4 average
Force of Will
8 copies - 4 average
Nature's Claim
8 copies - 4 average
Forbidden Orchard
8 copies - 4 average
Oko, Thief of Crowns
8 copies - 4 average
Ravenous Trap
8 copies - 4 average
Tropical Island
6 copies - 3 average
Soul-Guide Lantern
6 copies - 3 average
Volcanic Island
5 copies - 2.5 average
Flooded Strand
4 copies - 2 average
Force of Negation
4 copies - 2 average
Flusterstorm
4 copies - 2 average
Veil of Summer
4 copies - 2 average
Ancient Grudge
4 copies - 2 average
Mox Emerald
2 copies - 1 average
Black Lotus
2 copies - 1 average
Mox Jet
2 copies - 1 average
Narset, Parter of Veils
2 copies - 1 average