Most played cards in Dark Depths:

1 Decks
Stitcher's Supplier
4 copies - 4 average
Satyr Wayfinder
4 copies - 4 average
Verdant Catacombs
4 copies - 4 average
Vampire Hexmage
4 copies - 4 average
Cabal Therapy
4 copies - 4 average
Thoughtseize
4 copies - 4 average
Crop Rotation
4 copies - 4 average
Urborg, Tomb of Yawgmoth
4 copies - 4 average
Hogaak, Arisen Necropolis
4 copies - 4 average
Thespian's Stage
4 copies - 4 average
Dark Depths
4 copies - 4 average
Force of Vigor
3 copies - 3 average
Mox Diamond
3 copies - 3 average
Surgical Extraction
3 copies - 3 average
Khalni Garden
3 copies - 3 average
Elvish Reclaimer
3 copies - 3 average
Sylvan Safekeeper
3 copies - 3 average
Bayou
2 copies - 2 average
Pithing Needle
2 copies - 2 average
Assassin's Trophy
2 copies - 2 average