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.

Beast Whisperer

Whenever you cast a creature spell, draw a card.

Lys Alana Huntmaster

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

Reprieve

Return target spell to its owner's hand.
Draw a card.

Avacyn's Pilgrim

Essence Warden

Whenever another creature enters, you gain 1 life.

Priest of Titania

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

Forest

Revitalize

Ajani's Pridemate

Whenever you gain life, put a +1/+1 counter on this creature.

Trelasarra, Moon Dancer

Whenever you gain life, put a +1/+1 counter on Trelasarra, Moon Dancer and scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Plains

Spirit Link

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Whenever enchanted creature deals damage, you gain that much life.