Loam Dryad

{T}, Tap an untapped creature you control: Add one mana of any color.

Ignoble Hierarch

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
{T}: Add {B}, {R}, or {G}.

Sky Diamond

This artifact enters tapped.
{T}: Add {U}.

Esper Sentinel

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is this creature's power.

Mass Hysteria

Iron Myr

Gyre Engineer

Plains

Druid of the Anima

Skull Prophet

{T}: Add {B} or {G}.
{T}: Mill two cards. (Put the top two cards of your library into your graveyard.)

Utopia Tree

Skyshroud Elf

Llanowar Elves

Incubation Druid

{T}: Add one mana of any type that a land you control could produce. If this creature has a +1/+1 counter on it, add three mana of that type instead.
{3}{G}{G}: Adapt 3. (If this creature has no +1/+1 counters on it, put three +1/+1 counters on it.)

Quirion Explorer

{T}: Add one mana of any color that a land an opponent controls could produce.

Circle of Dreams Druid

{T}: Add {G} for each creature you control.

Noble Hierarch

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
{T}: Add {G}, {W}, or {U}.

Rattleclaw Mystic

{T}: Add {G}, {U}, or {R}.
Morph {2} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When this creature is turned face up, add {G}{U}{R}.

Deathcap Cultivator

{T}: Add {B} or {G}.
Delirium — This creature has deathtouch as long as there are four or more card types among cards in your graveyard.

Blossom-Clad Werewolf

{T}: Add two mana of any one color.
Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Weaver of Blossoms

{T}: Add one mana of any color.
Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

Weaver of Blossoms // Blossom-Clad Werewolf

Elves of Deep Shadow

{T}: Add {B}. This creature deals 1 damage to you.

Copper Myr

Arcane Signet

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

Harvester Druid

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

Boreal Druid

Forest

Sylvan Caryatid

Defender, hexproof
{T}: Add one mana of any color.

Leaden Myr

Naga Vitalist

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

Alloy Myr

Devoted Druid

{T}: Add {G}.
Put a -1/-1 counter on this creature: Untap this creature.

Rootcoil Creeper

{T}: Add one mana of any color.
{T}: Add two mana of any one color. Spend this mana only to cast spells from your graveyard.
{G}{U}, {T}, Exile this creature: Return target card with flashback you own from exile to your hand.

Elvish Mystic

Swamp

Elvish Harbinger

When this creature enters, you may search your library for an Elf card, reveal it, then shuffle and put that card on top.
{T}: Add one mana of any color.

Sylvok Explorer

Maraleaf Pixie

Reclusive Taxidermist

This creature gets +3/+2 as long as there are four or more creature cards in your graveyard.
{T}: Add one mana of any color.

Najeela, the Blade-Blossom

Whenever a Warrior attacks, you may have its controller create a 1/1 white Warrior creature token that's tapped and attacking.
{W}{U}{B}{R}{G}: Untap all attacking creatures. They gain trample, lifelink, and haste until end of turn. After this phase, there is an additional combat phase. Activate only during combat.

Arbor Elf

Bloom Tender

Vivid — {T}: For each color among permanents you control, add one mana of that color.

Paradise Druid

This creature has hexproof as long as it's untapped. (It can't be the target of spells or abilities your opponents control.)
{T}: Add one mana of any color.

Knotvine Mystic

Fire Diamond

This artifact enters tapped.
{T}: Add {R}.

Gold Myr

Avacyn's Pilgrim

Birds of Paradise

Wirewood Channeler

{T}: Add X mana of any one color, where X is the number of Elves on the battlefield.

Manaweft Sliver

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

Sol Ring

Boros Signet

Gruul Signet

Dimir Signet

Silver Myr

Charcoal Diamond

This artifact enters tapped.
{T}: Add {B}.

Island

Fyndhorn Elves

Ilysian Caryatid

{T}: Add one mana of any color. If you control a creature with power 4 or greater, add two mana of any one color instead.

Palladium Myr

Golgari Signet

Glittermonger

{T}: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Marble Diamond

This artifact enters tapped.
{T}: Add {W}.

Drover of the Mighty

This creature gets +2/+2 as long as you control a Dinosaur.
{T}: Add one mana of any color.