Most played cards in Dark Depths :

3 Decks
Thespian's Stage
7 copies - 2.33 average
Dark Depths
7 copies - 2.33 average
Helm of Obedience
4 copies - 1.33 average
Urborg, Tomb of Yawgmoth
4 copies - 1.33 average
Elvish Reclaimer
4 copies - 1.33 average
Urza's Saga
4 copies - 1.33 average
Knight of the Reliquary
4 copies - 1.33 average
Windswept Heath
4 copies - 1.33 average
Swords to Plowshares
4 copies - 1.33 average
Crop Rotation
4 copies - 1.33 average
Green Sun's Zenith
4 copies - 1.33 average
Dark Confidant
4 copies - 1.33 average
Leyline of the Void
4 copies - 1.33 average
Duress
4 copies - 1.33 average
Vampire Hexmage
4 copies - 1.33 average
Dauthi Voidwalker
4 copies - 1.33 average
Dark Ritual
4 copies - 1.33 average
Thoughtseize
4 copies - 1.33 average
Expedition Map
4 copies - 1.33 average
Pithing Needle
4 copies - 1.33 average