Most played cards in Battle of Wits:

3 Decks
Snow-Covered Island
53 copies - 17.67 average
Snow-Covered Swamp
43 copies - 14.33 average
Teferi, Mage of Zhalfir
12 copies - 4 average
Underground River
12 copies - 4 average
Remand
12 copies - 4 average
Mana Leak
12 copies - 4 average
Dimir Aqueduct
12 copies - 4 average
Dimir Signet
12 copies - 4 average
Cancel
12 copies - 4 average
Clutch of the Undercity
12 copies - 4 average
Brainspoil
12 copies - 4 average
Compulsive Research
12 copies - 4 average
Battle of Wits
12 copies - 4 average
Careful Consideration
12 copies - 4 average
Mystical Teachings
11 copies - 3.67 average
Diabolic Tutor
9 copies - 3 average
Azorius Signet
8 copies - 2.67 average
Azorius Chancery
8 copies - 2.67 average
Watery Grave
8 copies - 2.67 average
Spell Snare
8 copies - 2.67 average