Dark Depths

Dark Depths enters 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.

Exploration

You may play an additional land on each of your turns.

Vesuva

You may have Vesuva enter tapped as a copy of any land on the battlefield.

Concordant Crossroads

Black Lotus

{T}, Sacrifice Black Lotus: Add three mana of any one color.