Sachi, Daughter of Seshiro

Other Snake creatures you control get +0/+1.
Shamans you control have "{T}: Add {G}{G}."

Whisperer of the Wilds

{T}: Add {G}.
Ferocious — {T}: Add {G}{G}. Activate only if you control a creature with power 4 or greater.

Harabaz Druid

{T}: Add X mana of any one color, where X is the number of Allies you control.

Selvala, Heart of the Wilds

Whenever another creature enters, its controller may draw a card if its power is greater than each other creature's power.
{G}, {T}: Add X mana in any combination of colors, where X is the greatest power among creatures you control.

Orochi Leafcaller

Gemhide Sliver

All Slivers have "{T}: Add one mana of any color."

Harvester Druid

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

Wirewood Elf

Devoted Druid

{T}: Add {G}.
Put a -1/-1 counter on Devoted Druid: Untap Devoted Druid.

Seton, Krosan Protector

Tap an untapped Druid you control: Add {G}.

Sylvan Caryatid

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

Llanowar Mentor

{G}, {T}, Discard a card: Create a 1/1 green Elf Druid creature token named Llanowar Elves. It has "{T}: Add {G}."

Honored Hierarch

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
As long as Honored Hierarch is renowned, it has vigilance and "{T}: Add one mana of any color."

Quirion Explorer

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

Rishkar, Peema Renegade

When Rishkar, Peema Renegade enters, put a +1/+1 counter on each of up to two target creatures.
Each creature you control with a counter on it has "{T}: Add {G}."

Birds of Paradise

Moonscarred Werewolf

Vigilance
{T}: Add {G}{G}.
At the beginning of each upkeep, if a player cast two or more spells last turn, transform Moonscarred Werewolf.

Scorned Villager

{T}: Add {G}.
At the beginning of each upkeep, if no spells were cast last turn, transform Scorned Villager.

Scorned Villager // Moonscarred Werewolf

Utopia Tree

Vine Trellis

Defender (This creature can't attack.)
{T}: Add {G}.

Maraleaf Pixie

Hedron Crawler

{T}: Add {C}. ({C} represents colorless mana.)

Fyndhorn Elves

Elvish Archdruid

Other Elf creatures you control get +1/+1.
{T}: Add {G} for each Elf you control.

Golden Hind

Llanowar Tribe

Werebear

{T}: Add {G}.
Threshold — Werebear gets +3/+3 as long as seven or more cards are in your graveyard.

Scuttlemutt

{T}: Add one mana of any color.
{T}: Target creature becomes the color or colors of your choice until end of turn.

Kydele, Chosen of Kruphix

{T}: Add {C} for each card you've drawn this turn.
Partner (You can have two commanders if both have partner.)

Paradise Druid

Paradise Druid 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.

Beastcaller Savant

Haste
{T}: Add one mana of any color. Spend this mana only to cast a creature spell.

Heritage Druid

Tap three untapped Elves you control: Add {G}{G}{G}.

Gyre Sage

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
{T}: Add {G} for each +1/+1 counter on Gyre Sage.

Elvish Harbinger

When Elvish Harbinger 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.

Greenweaver Druid

Drover of the Mighty

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

Leaf Gilder

Priest of Titania

{T}: Add {G} for each Elf on the battlefield.

Gyre Engineer

Plague Myr

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
{T}: Add {C}.

Joraga Treespeaker

Level up {1}{G} ({1}{G}: Put a level counter on this. Level up only as a sorcery.)
LEVEL 1-4
1/2
{T}: Add {G}{G}.
LEVEL 5+
1/4
Elves you control have "{T}: Add {G}{G}."

Oasis Ritualist

{T}: Add one mana of any color.
{T}, Exert Oasis Ritualist: Add two mana of any one color. (An exerted creature won't untap during your next untap step.)

Manakin

Sylvok Explorer

Lifespring Druid

Copper Myr

Magus of the Library

{T}: Add {C}.
{T}: Draw a card. Activate only if you have exactly seven cards in hand.

Boreal Druid

Sea Scryer

Kinnan, Bonder Prodigy

Whenever you tap a nonland permanent for mana, add one mana of any type that permanent produced.
{5}{G}{U}: Look at the top five cards of your library. You may put a non-Human creature card from among them onto the battlefield. Put the rest on the bottom of your library in a random order.

Seasonal Ritual

Add one mana of any color. (Then exile this card. You may cast the creature later from exile.)

Rosethorn Acolyte

Rosethorn Acolyte // Seasonal Ritual

Heart Warden

{T}: Add {G}.
{2}, Sacrifice Heart Warden: Draw a card.

Elfhame Druid

{T}: Add {G}.
{T}: Add {G}{G}. Spend this mana only to cast kicked spells.

Drumhunter

At the beginning of your end step, if you control a creature with power 5 or greater, you may draw a card.
{T}: Add {C}.

Leafkin Druid

{T}: Add {G}. If you control four or more creatures, add {G}{G} instead.

Millikin

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

Silhana Starfletcher

Reach (This creature can block creatures with flying.)
As Silhana Starfletcher enters, choose a color.
{T}: Add one mana of the chosen color.

Naga Vitalist

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

Palladium Myr

Weaver of Currents

Nantuko Elder

Somberwald Sage

{T}: Add three mana of any one color. Spend this mana only to cast creature spells.

Orochi Sustainer

Manaweft Sliver

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

Silver Myr

Karametra's Acolyte

{T}: Add an amount of {G} equal to your devotion to green. (Each {G} in the mana costs of permanents you control counts toward your devotion to green.)

Saruli Caretaker

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

Wirewood Channeler

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

Ulvenwald Abomination

Ulvenwald Captive

Defender
{T}: Add {G}.
{5}{G}{G}: Transform Ulvenwald Captive.

Ulvenwald Captive // Ulvenwald Abomination

Opaline Unicorn

Quirion Elves

As Quirion Elves enters, choose a color.
{T}: Add {G}.
{T}: Add one mana of the chosen color.

Llanowar Elves

Marwyn, the Nurturer

Whenever another Elf you control enters, put a +1/+1 counter on Marwyn, the Nurturer.
{T}: Add an amount of {G} equal to Marwyn's power.

Woodland Mystic

Viridian Joiner

{T}: Add an amount of {G} equal to Viridian Joiner's power.

Servant of the Conduit

When Servant of the Conduit enters, you get {E}{E} (two energy counters).
{T}, Pay {E}: Add one mana of any color.

Channeler Initiate

When Channeler Initiate enters, put three -1/-1 counters on target creature you control.
{T}, Remove a -1/-1 counter from Channeler Initiate: Add one mana of any color.

Fyndhorn Elder

Incubation Druid

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

Sacellum Godspeaker

{T}: Reveal any number of creature cards with power 5 or greater from your hand. Add {G} for each card revealed this way.

Druid of the Cowl

Shaman of Forgotten Ways

{T}: Add two mana in any combination of colors. Spend this mana only to cast creature spells.
Formidable — {9}{G}{G}, {T}: Each player's life total becomes the number of creatures they control. Activate only if creatures you control have total power 8 or greater.

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.