Most played cards in U Sanctum:

1 Decks
Hydrolash
4 copies - 4 average
Engulf the Shore
4 copies - 4 average
Thing in the Ice
4 copies - 4 average
Negate
4 copies - 4 average
Dispel
4 copies - 4 average
Part the Waterveil
4 copies - 4 average
Anticipate
4 copies - 4 average
Prism Ring
4 copies - 4 average
Take Inventory
4 copies - 4 average
Pore Over the Pages
4 copies - 4 average
Jace's Sanctum
4 copies - 4 average
Summary Dismissal
3 copies - 3 average
Day's Undoing
2 copies - 2 average
Rise from the Tides
1 copies - 1 average
Pieces of the Puzzle
1 copies - 1 average