Most played cards in Gadwick, the Wizened:

2 Decks
Snow-Covered Island
31 copies - 15.5 average
Miscalculation
2 copies - 1 average
Merchant Scroll
2 copies - 1 average
Mystic Confluence
2 copies - 1 average
Ponder
2 copies - 1 average
Remand
2 copies - 1 average
Preordain
2 copies - 1 average
Mental Misstep
2 copies - 1 average
Mana Leak
2 copies - 1 average
Gigadrowse
2 copies - 1 average
Frantic Search
2 copies - 1 average
High Tide
2 copies - 1 average
Impulse
2 copies - 1 average
Repeal
2 copies - 1 average
Memory Lapse
2 copies - 1 average
Sleight of Hand
2 copies - 1 average
Unsubstantiate
2 copies - 1 average
Turnabout
2 copies - 1 average
Extraplanar Lens
2 copies - 1 average
Sapphire Medallion
2 copies - 1 average