Duskmourn: House of Horror Commander

Tainted Field

{T}: Add {C}.
{T}: Add {W} or {B}. Activate only if you control a Swamp.

The Glowing Sea is the most highly irradiated region in the entire Commonwealth. According to local legend, it was ground zero for the high-yield nuclear blast that devastated most of the area.

Fallout

The Lost Caverns of Ixalan Commander

Commander Masters

March of the Machine Commander

Phyrexia: All Will Be One Commander

Commander Legends: Battle for Baldur's Gate

Commander 2021

Explorers of Ixalan

{T}: Add {C} to your mana pool.
{T}: Add {W} or {B} to your mana pool. Activate this ability only if you control a Swamp.

Commander 2015

{T}: Add {1} to your mana pool.{T}: Add {W} or {B} to your mana pool. Activate this ability only if you control a Swamp.

Duel Decks: Sorin vs. Tibalt

{T}: Add {1} to your mana pool.
{T}: Add {W} or {B} to your mana pool. Activate this ability only if you control a Swamp.

Torment

oc
T: Add one colorless mana to your mana pool.
oc
T: Add o
W or o
B to your mana pool. Play this ability only if you control a swamp.