Elvish Piper

{G}, {T}: You may put a creature card from your hand onto the battlefield.

Curiosity

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Islands don't untap during their controllers' untap steps.

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

Enchant permanent
You control enchanted permanent.

Search target opponent's library for a creature card and put that card onto the battlefield under your control. Then that player shuffles.

Put two target lands on top of their owners' libraries.

Whenever a creature dies, that creature's controller may draw a card.

Creatures don't untap during their controllers' untap steps.
Whenever a creature enters, untap all creatures.

{U}{U}{U}, {T}: Return target permanent to its owner's hand.

Enchant artifact
You control enchanted artifact.

Return target green card from your graveyard to your hand.

Creatures with power greater than the number of cards in your hand can't attack.

Return all creatures to their owners' hands.

Search your library for a blue instant card, reveal that card, put it into your hand, then shuffle.