When Agent of Treachery enters the battlefield, gain control of target permanent.

At the beginning of your end step, if you control three or more permanents you don't own, draw three cards.

Whenever a creature enters the battlefield under your control, you gain 1 life. If Answered Prayers isn't a creature, it becomes a 3/3 Angel creature with flying in addition to its other types until end of turn.

Whenever an Angel enters the battlefield under your control, you gain 4 life.

Whenever an Angel you control dies, create a 1/1 white Spirit creature token with flying.

Choose up to two target permanent cards in your graveyard that were put there from the battlefield this turn. Return them to the battlefield tapped.

Flying

When Cavalier of Gales enters the battlefield, draw three cards, then put two cards from your hand on top of your library in any order.

When Cavalier of Gales dies, shuffle it into its owner's library, then scry 2.

Flying

When Cloudkin Seer enters the battlefield, draw a card.

Destroy target artifact or enchantment.

Flying

Whenever Dragon Mage deals combat damage to a player, each player discards their hand, then draws seven cards.

Each player shuffles their hand and graveyard into their library, then draws seven cards.

Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying

When Faerie Seer enters the battlefield, scry 2.

If it's not your turn, you may exile a green card from your hand rather than pay this spell's mana cost.

Destroy up to two target artifacts and/or enchantments.

Destroy target permanent. Its controller creates a 3/3 green Elephant creature token.

As Mirrodin Besieged enters the battlefield, choose Mirran or Phyrexian.

• Mirran -- Whenever you cast an artifact spell, create a 1/1 colorless Myr artifact creature token.

• Phyrexian -- At the beginning of your end step, draw a card, then discard a card. Then if there are fifteen or more artifact cards in your graveyard, target opponent loses the game.

When Overgrowth Elemental enters the battlefield, put a +1/+1 counter on another target Elemental you control.

Whenever another creature you control dies, you gain 1 life. If that creature was an Elemental, put a +1/+1 counter on Overgrowth Elemental.

Reckless Rage deals 4 damage to target creature you don't control and 2 damage to target creature you control.

When you next cast an instant spell, cast a sorcery spell, or activate a loyalty ability this turn, copy that spell or ability twice. You may choose new targets for the copies.

Whenever another blue creature enters the battlefield under your control, target player mills two cards.

When Scholar of the Ages enters the battlefield, return up to two target instant and/or sorcery cards from your graveyard to your hand.

Flying

{B}, Pay 2 life: Target creature gets -1/-1 until end of turn.

Whenever you lose life, draw that many cards. (Damage causes loss of life.)

Hideaway 4 (When this creature enters the battlefield, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)

Watcher for Tomorrow enters the battlefield tapped.

When Watcher for Tomorrow leaves the battlefield, put the exiled card into its owner's hand.