Immaculate Magistrate

{T}: Put a +1/+1 counter on target creature for each Elf you control.

Elvish Promenade

Create a 1/1 green Elf Warrior creature token for each Elf you control.

Flash (You may cast this spell any time you could cast an instant.)
You may cast green creature spells as though they had flash.

Sacrifice Elvish Eulogist: You gain 1 life for each Elf card in your graveyard.

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

Steel Leaf Champion can't be blocked by creatures with power 2 or less.

Other Elves you control get +1/+1.
{G}, {T}: Create a 1/1 green Elf Warrior creature token.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Other Elves you control get +1/+1.
{4}{G}{G}, {T}: Search your library for a card named Elvish Clancaller, put it onto the battlefield, then shuffle.

Whenever another creature enters, you gain 1 life.

Whenever Copperhorn Scout attacks, untap each other creature you control.

Other Elf creatures get +1/+1 and have forestwalk. (They can't be blocked as long as defending player controls a Forest.)

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

Whenever Rhys the Exiled attacks, you gain 1 life for each Elf you control.
{B}, Sacrifice an Elf: Regenerate Rhys the Exiled.

Whenever you cast an Elf spell, you may create a 1/1 green Elf Warrior creature token.