Control Magic

Enchant creature
You control enchanted creature.

Urborg Elf

Sylvan Messenger

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
When Sylvan Messenger 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.

Abduction

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

Gaea's Skyfolk

Jungle Barrier

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

Elvish Champion

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

Kaysa

Wall of Blossoms

Defender
When Wall of Blossoms enters, draw a card.

Confiscate

Enchant permanent
You control enchanted permanent.

Rampant Growth

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Yavimaya's Embrace

Enchant creature
You control enchanted creature.
Enchanted creature gets +2/+2 and has trample.