Swamp

Morcant's Loyalist

Other Elves you control get +1/+1.
When this creature dies, return another target Elf card from your graveyard to your hand.

Scarblade Scout

Lifelink
When this creature enters, mill two cards. (Put the top two cards of your library into your graveyard.)

Lys Alana Informant

When this creature enters or dies, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Dawnhand Eulogist

Menace (This creature can't be blocked except by two or more creatures.)
When this creature enters, mill three cards. Then if there is an Elf card in your graveyard, each opponent loses 2 life and you gain 2 life. (To mill three cards, put the top three cards of your library into your graveyard.)

Blight Rot

Put four -1/-1 counters on target creature.

Lluwen, Imperfect Naturalist

When Lluwen enters, mill four cards, then you may put a creature or land card from among the milled cards on top of your library.
{2}{B/G}{B/G}{B/G}, {T}, Discard a land card: Create a 1/1 black and green Worm creature token for each land card in your graveyard.

Lys Alana Dignitary

As an additional cost to cast this spell, behold an Elf or pay {2}. (To behold an Elf, choose an Elf you control or reveal an Elf card from your hand.)
{T}: Add {G}{G}. Activate only if there is an Elf card in your graveyard.

Morcant's Eyes

At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
{4}{G}{G}, Sacrifice this enchantment: Create X 2/2 black and green Elf creature tokens, where X is the number of Elf cards in your graveyard. Activate only as a sorcery.

Gloom Ripper

When this creature enters, target creature you control gets +X/+0 until end of turn and up to one target creature an opponent controls gets -0/-X until end of turn, where X is the number of Elves you control plus the number of Elf cards in your graveyard.

Forest

Eclipsed Elf

When this creature enters, look at the top four cards of your library. You may reveal an Elf, Swamp, or Forest card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.