Most played cards in Tyrant Oath:

93 Decks
Oath of Druids
370 copies - 3.98 average
Forbidden Orchard
369 copies - 3.97 average
Force of Will
364 copies - 3.91 average
Brainstorm
267 copies - 2.87 average
Polluted Delta
199 copies - 2.14 average
Underground Sea
196 copies - 2.11 average
Flooded Strand
187 copies - 2.01 average
Duress
178 copies - 1.91 average
Gush
173 copies - 1.86 average
Tropical Island
173 copies - 1.86 average
Tidespout Tyrant
168 copies - 1.81 average
Mana Drain
164 copies - 1.76 average
Leyline of the Void
155 copies - 1.67 average
Merchant Scroll
117 copies - 1.26 average
Ponder
111 copies - 1.19 average
Pithing Needle
107 copies - 1.15 average
98 copies - 1.05 average
Extirpate
95 copies - 1.02 average
Black Lotus
93 copies - 1 average
Mox Emerald
92 copies - 0.99 average