Most played cards in Oath:

3 Decks
Yavimaya Coast
12 copies - 4 average
Counterspell
12 copies - 4 average
Oath of Druids
12 copies - 4 average
Exploration
12 copies - 4 average
Gush
10 copies - 3.33 average
Horn of Greed
9 copies - 3 average
Intuition
8 copies - 2.67 average
Accumulated Knowledge
8 copies - 2.67 average
Naturalize
6 copies - 2 average
Back to Basics
6 copies - 2 average
Propaganda
6 copies - 2 average
Hydroblast
6 copies - 2 average
Moment's Peace
6 copies - 2 average
Morphling
5 copies - 1.67 average
Time Warp
5 copies - 1.67 average
Misdirection
5 copies - 1.67 average
Mana Leak
4 copies - 1.33 average
Krosan Reclamation
4 copies - 1.33 average
Curfew
4 copies - 1.33 average
Capsize
4 copies - 1.33 average