Most played cards in Yorion Control:

3 Decks
Force of Will
12 copies - 4 average
Ponder
12 copies - 4 average
Swords to Plowshares
12 copies - 4 average
Misty Rainforest
12 copies - 4 average
Brainstorm
12 copies - 4 average
Uro, Titan of Nature's Wrath
10 copies - 3.33 average
Green Sun's Zenith
8 copies - 2.67 average
Carpet of Flowers
8 copies - 2.67 average
Force of Negation
8 copies - 2.67 average
Windswept Heath
8 copies - 2.67 average
Wasteland
8 copies - 2.67 average
Teferi, Time Raveler
7 copies - 2.33 average
Surgical Extraction
6 copies - 2 average
Prismatic Ending
6 copies - 2 average
Leyline Binding
6 copies - 2 average
Veil of Summer
6 copies - 2 average
Endurance
6 copies - 2 average
Pyroblast
5 copies - 1.67 average
Force of Vigor
5 copies - 1.67 average
Dress Down
5 copies - 1.67 average