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}.

Wayfarer's Bauble

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Destroy target artifact. Its controller loses 1 life.

Blooming Marsh enters tapped unless you control two or fewer other lands.
{T}: Add {B} or {G}.

Jungle Hollow enters tapped.
When Jungle Hollow enters, you gain 1 life.
{T}: Add {B} or {G}.

First strike, deathtouch
Whenever a creature an opponent controls dies, you may return target artifact card from your graveyard to your hand.

{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.

{T}, Mill a card: Add {C}. (To mill a card, put the top card of your library into your graveyard.)

Artifact spells you cast cost {1} less to cast.

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

{T}: Add {C}.
{1}, {T}, Sacrifice an artifact: You gain 1 life.

First strike
{T}: Destroy target artifact if its mana value is equal to the amount of unspent mana you have.

{T}: Add {C}.
{T}: Add {B} or {G}. Llanowar Wastes deals 1 damage to you.

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