Mana Confluence

{T}, Pay 1 life: Add one mana of any color.

Overgrown Farmland

Overgrown Farmland enters tapped unless you control two or more other lands.
{T}: Add {G} or {W}.

{T}, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, then shuffle.

({T}: Add {R} or {W}.)
As Sacred Foundry enters, you may pay 2 life. If you don't, it enters tapped.

Spire Garden enters tapped unless you have two or more opponents.
{T}: Add {R} or {G}.

Rockfall Vale enters tapped unless you control two or more other lands.
{T}: Add {R} or {G}.

{T}, Pay 1 life, Sacrifice Wooded Foothills: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.

{T}: Add one mana of any type that a land you control could produce.

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

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

{T}: Add {C}.
{T}: Add {G} or {W}. Brushland deals 1 damage to you.

{T}, Pay 1 life, Sacrifice Prismatic Vista: Search your library for a basic land card, put it onto the battlefield, then shuffle.

{T}, Pay 1 life, Sacrifice Windswept Heath: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle.

{T}: Add {C}.
{T}: Add {R} or {G}. Karplusan Forest deals 1 damage to you.

Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

Sundown Pass enters tapped unless you control two or more other lands.
{T}: Add {R} or {W}.

{T}: Add {C}.
{T}: Add {R} or {W}. Battlefield Forge deals 1 damage to you.

Bountiful Promenade enters tapped unless you have two or more opponents.
{T}: Add {G} or {W}.

Spectator Seating enters tapped unless you have two or more opponents.
{T}: Add {R} or {W}.