Golgari Rot Farm

Golgari Rot Farm enters tapped.
When Golgari Rot Farm enters, return a land you control to its owner's hand.
{T}: Add {B}{G}.

Overgrown Tomb

({T}: Add {B} or {G}.)
As Overgrown Tomb enters, you may pay 2 life. If you don't, it enters tapped.

Undergrowth Stadium enters tapped unless you have two or more opponents.
{T}: Add {B} or {G}.

Deathcap Glade enters tapped unless you control two or more other lands.
{T}: Add {B} or {G}.

{T}: Add {C}.
{4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

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

{T}: Add one mana of any color in your commander's color identity.

Woodland Cemetery enters tapped unless you control a Swamp or a Forest.
{T}: Add {B} or {G}.

{T}: Add {C}.
{B/G}, {T}: Add {B}{B}, {B}{G}, or {G}{G}.

Temple of Malady enters tapped.
When Temple of Malady enters, scry 1.
{T}: Add {B} or {G}.

{T}: Add {C}.
{4}, {T}: Target creature can't be blocked this turn.