Cabal Coffers

{2}, {T}: Add {B} for each Swamp you control.

Ancient Tomb

{T}: Add {C}{C}. Ancient Tomb deals 2 damage to you.

Badlands

Dream Halls

Rather than pay the mana cost for a spell, its controller may discard a card that shares a color with that spell.

Savannah

Urborg, Tomb of Yawgmoth

Each land is a Swamp in addition to its other land types.

Volcanic Island

Field of the Dead

Field of the Dead enters tapped.
{T}: Add {C}.
Whenever Field of the Dead or another land you control enters, if you control seven or more lands with different names, create a 2/2 black Zombie creature token.

Cavern of Souls

As Cavern of Souls enters, choose a creature type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Wheel of Fortune

Each player discards their hand, then draws seven cards.

Underground Sea

Taiga

Crucible of Worlds

Plateau

Tropical Island

Bayou

Guardian Project

Whenever a nontoken creature you control enters, if it doesn't have the same name as another creature you control or a creature card in your graveyard, draw a card.