This deck aims to get Marit Lage (20/20 Indestructible Flier) out on the field quickly and hopefully also equip her with Lightning Greaves to dodge bouncing and attack the turn you play her. Threw Rancor in there to counter flying chumpers.

Main Marit Lage combos:

Vampire Hexmage + Dark Depths = Marit Lage at the cost of BB and a land-drop.

Thespian's Stage + Dark Depths = Marit Lage for 2 mana. Copy Dark Depths with Thespian's Stage's second ability then sac Dark Depths from the Legend rule. Thespian's Stage gains the effect but not the counters so sac it to summon Marit Lage

Support:

Crop Rotation to place Dark Depths on the field from the deck. Sac the land you used to pay its mana cost for maximum efficiency.

Lotus Petal + Dark Ritual: both of these cards help enormously in speeding up your mana in the early turns to play your combo pieces or using Sylvan Scrying or Crop Rotation to tutor Dark Depths

Possible turn 1 kill:

Let me know what you think. :)