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

Flying

Defender (This creature can't attack.) When this creature enters, draw a card.

Green creatures you control get +1/+1.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) When this creature enters, reveal the top four cards of your library. Put all Elf cards revealed this way into your hand and the rest on the bottom of your library in any order.

{T}: Add {B}, {G}, or {U}.

Enchant creature When this Aura enters, untap enchanted creature. You control enchanted creature. When enchanted creature dies, return that card to the battlefield under its owner's control.

Enchant permanent You control enchanted permanent.

Enchant creature You control enchanted creature.