Deeproot Historian

Merfolk and Druid cards in your graveyard have retrace. (You may cast cards with retrace from your graveyard by discarding a land card in addition to paying their other costs.)

Elvish Pioneer

When this creature enters, you may put a basic land card from your hand onto the battlefield tapped.

Druid Lyrist

{G}, {T}, Sacrifice this creature: Destroy target enchantment.

Harmonize

Forest

Seton, Krosan Protector

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

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}."

Elvish Mystic

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.)

Llanowar Elves

Farhaven Elf

When this creature enters, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Fyndhorn Elves

Leafkin Druid

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

Voyaging Satyr

Genesis Wave

Reveal the top X cards of your library. You may put any number of permanent cards with mana value X or less from among them onto the battlefield. Then put all cards revealed this way that weren't put onto the battlefield into your graveyard.

Vitalize

Voice of Many

When this creature enters, draw a card for each opponent who controls fewer creatures than you.

Llanowar Mentor

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

Emerald Medallion

Green spells you cast cost {1} less to cast.

Augur of Autumn

You may look at the top card of your library any time.
You may play lands from the top of your library.
Coven — As long as you control three or more creatures with different powers, you may cast creature spells from the top of your library.