{T}: Add one mana of any color. Spend this mana only to cast a creature spell.
--
Arcane Sanctum
Land
Arcane Sanctum enters the battlefield tapped.
{T}: Add {W}, {U}, or {B}.
{3}
Chromatic Lantern
Artifact
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{6}
Composite Golem
Artifact Creature - Golem
Sacrifice Composite Golem: Add {W}{U}{B}{R}{G}.
4 /
4
--
Crumbling Necropolis
Land
Crumbling Necropolis enters the battlefield tapped.
{T}: Add {U}, {B}, or {R}.
--
Crystal Quarry
Land
{T}: Add {C}.
{5}, {T}: Add {W}{U}{B}{R}{G}.
{3}
Darksteel Ingot
Artifact
Indestructible
{T}: Add one mana of any color.
--
Forbidden Orchard
Land
{T}: Add one mana of any color.
Whenever you tap Forbidden Orchard for mana, target opponent creates a 1/1 colorless Spirit creature token.
--
Gemstone Mine
Land
Gemstone Mine enters the battlefield with three mining counters on it.
{T}, Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.
{G}{U}{R}
Guided Passage
Sorcery
Reveal the cards in your library. An opponent chooses from among them a creature card, a land card, and a noncreature, nonland card. You put the chosen cards into your hand. Then shuffle.
--
Jungle Shrine
Land
Jungle Shrine enters the battlefield tapped.
{T}: Add {R}, {G}, or {W}.
{2}
Kaleidostone
Artifact
When Kaleidostone enters the battlefield, draw a card.