Shivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.

Mountain

Forest

Rakdos Guildgate

This land enters tapped.
{T}: Add {B} or {R}.

Chromatic Orrery

You may spend mana as though it were mana of any color.
{T}: Add {C}{C}{C}{C}{C}.
{5}, {T}: Draw a card for each color among permanents you control.

Simic Guildgate

This land enters tapped.
{T}: Add {G} or {U}.

Command Tower

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

Gruul Guildgate

This land enters tapped.
{T}: Add {R} or {G}.

Orzhov Guildgate

This land enters tapped.
{T}: Add {W} or {B}.

Gond Gate

Gates you control enter untapped.
{T}: Add {C}.
{T}: Add one mana of any color that a Gate you control could produce.

Regrowth

Return target card from your graveyard to your hand.

Commander's Sphere

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

Sol Ring

Azorius Guildgate

This land enters tapped.
{T}: Add {W} or {U}.

Dimir Guildgate

This land enters tapped.
{T}: Add {U} or {B}.

Boros Guildgate

This land enters tapped.
{T}: Add {R} or {W}.

Arcane Signet

Golgari Guildgate

This land enters tapped.
{T}: Add {B} or {G}.

Disenchant

Patriar's Seal

{T}: Add one mana of any color.
{1}, {T}: Untap target legendary creature you control.

Black Lotus

{T}, Sacrifice this artifact: Add three mana of any one color.

Selesnya Guildgate

This land enters tapped.
{T}: Add {G} or {W}.

Braingeyser

Path of Ancestry

This land enters tapped.
{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Swamp

Garth One-Eye

{T}: Choose a card name that hasn't been chosen from among Disenchant, Braingeyser, Terror, Shivan Dragon, Regrowth, and Black Lotus. Create a copy of the card with the chosen name. You may cast the copy. (You still pay its costs.)

Island

Plains

Chromatic Lantern

Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.

Birds of Paradise

Gateway Plaza

This land enters tapped.
When this land enters, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.

Timeless Lotus

Timeless Lotus enters tapped.
{T}: Add {W}{U}{B}{R}{G}.

Decanter of Endless Water

You have no maximum hand size.
{T}: Add one mana of any color.

Izzet Guildgate

This land enters tapped.
{T}: Add {U} or {R}.

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Reflecting Pool

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

Baldur's Gate

{T}: Add {C}.
{2}, {T}: Add X mana of any one color, where X is the number of other Gates you control.