Dark Depths enters the battlefield with ten ice counters on it.
{3}: Remove an ice counter from Dark Depths.
When Dark Depths has no ice counters on it, sacrifice it. If you do, create Marit Lage, a legendary 20/20 black Avatar creature token with flying and indestructible...
Search your library for a white card, a blue card, a black card, a red card, and a green card. Reveal those cards and put them into your hand. Then shuffle your library...
({2/B} can be paid with any two mana or with {B}. This card's converted mana cost is 6.)
Search your library for a card with converted mana cost less than or equal to the number of lands you control, reveal it, and put it into your hand. Then shuffle your library...