Underground River

{T}: Add {C}.
{T}: Add {U} or {B}. Underground River deals 1 damage to you.

Drowned Catacomb

Drowned Catacomb enters tapped unless you control an Island or a Swamp.
{T}: Add {U} or {B}.

({T}: Add {W} or {U}.)
Prairie Stream enters tapped unless you control two or more basic lands.

Isolated Chapel enters tapped unless you control a Plains or a Swamp.
{T}: Add {W} or {B}.

Glacial Fortress enters tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.

{T}: Add {C}.
{T}: Add {W} or {B}. Caves of Koilos deals 1 damage to you.

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

Dimir Aqueduct enters tapped.
When Dimir Aqueduct enters, return a land you control to its owner's hand.
{T}: Add {U}{B}.

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

({T}: Add {U} or {B}.)
Sunken Hollow enters tapped unless you control two or more basic lands.

Concealed Courtyard enters tapped unless you control two or fewer other lands.
{T}: Add {W} or {B}.

Orzhov Basilica enters tapped.
When Orzhov Basilica enters, return a land you control to its owner's hand.
{T}: Add {W}{B}.

{T}: Add {U}. If you played a land this turn, add {B} instead.

Azorius Chancery enters tapped.
When Azorius Chancery enters, return a land you control to its owner's hand.
{T}: Add {W}{U}.

{T}: Add {C}.
{T}: Add {W}. Activate only if you control an Island.
{T}: Add {U}. Activate only if you control a Plains.