Loxodon Warhammer

Equipped creature gets +3/+0 and has trample and lifelink.
Equip {3}

Wirewood Pride

Target creature gets +X/+X until end of turn, where X is the number of Elves on the battlefield.

Each player's life total becomes the number of creatures they control.

Forests you control are 1/1 green Elf creatures that are still lands.
{1}{G}, Sacrifice an Elf: Target creature gets +3/+3 until end of turn.

When Elvish Soultiller dies, choose a creature type. Shuffle all creature cards of that type from your graveyard into your library.

Trample
Heedless One's power and toughness are each equal to the number of Elves on the battlefield.

{T}: Add {C}.
{G}, {T}: Untap target Elf.

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional {G} for each Elf on the battlefield.

{T}: You gain 1 life for each Elf on the battlefield.

Cycling {2}{G}{G} ({2}{G}{G}, Discard this card: Draw a card.)
When you cycle Gempalm Strider, Elf creatures get +2/+2 until end of turn.

{T}: Target creature gets +X/+X until end of turn, where X is the number of Elves on the battlefield.

Whenever another Elf enters, put a +1/+1 counter on Elvish Vanguard.

When Wirewood Herald dies, you may search your library for an Elf card, reveal that card, put it into your hand, then shuffle.

Target creature gets +3/+3 until end of turn.

All creatures able to block Taunting Elf do so.

As Steely Resolve enters, choose a creature type.
Creatures of the chosen type have shroud. (They can't be the targets of spells or abilities.)

Tranquil Thicket enters tapped.
{T}: Add {G}.
Cycling {G} ({G}, Discard this card: Draw a card.)