Scattered Thoughts

Look at the top four cards of your library. Put two of those cards into your hand and the rest into your graveyard.

Screaming Swarm

Flying
Whenever you attack with one or more creatures, target player mills that many cards. (To mill a card, a player puts the top card of their library into their graveyard.)
{2}{U}: Put this card from your graveyard into your library second from the top.

Selhoff Entomber

{T}, Discard a creature card: Draw a card.

Serpentine Ambush

Until end of turn, target creature becomes a blue Serpent with base power and toughness 5/5.

Skywarp Skaab

Flying
When this creature enters, you may exile two creature cards from your graveyard. If you do, draw a card.

Soulcipher Board

This artifact enters with three omen counters on it.
{1}{U}, {T}: Look at the top two cards of your library. Put one of them into your graveyard.
Whenever a creature card is put into your graveyard from anywhere, remove an omen counter from this artifact. Then if it has no omen counters on it, transform it.

Rather than consort with demons, the Quietus Cult seeks wisdom from the dead.

Cipherbound Spirit

Flying
This creature can block only creatures with flying.
{3}{U}: Draw two cards, then discard a card.

Soulcipher Board // Cipherbound Spirit

Dawnhart Geist

Whenever you cast an enchantment spell, you gain 2 life.

Steelclad Spirit

Defender
Whenever an enchantment you control enters, this creature can attack this turn as though it didn't have defender.

A-Stitched Assistant

Stitched Assistant

Exploit (When this creature enters, you may sacrifice a creature.)
When this creature exploits a creature, scry 1, then draw a card. (To scry 1, look at the top card of your library, then you may put that card on the bottom.)

Stormchaser Drake

Flying
Whenever this creature becomes the target of a spell you control, draw a card.

Syncopate

Counter target spell unless its controller pays {X}. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Blood

Syphon Essence

Counter target creature or planeswalker spell. Create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")

Thirst for Discovery

Draw three cards. Then discard two cards unless you discard a basic land card.

Wanderlight Spirit

Flying
This creature can block only creatures with flying.

Wash Away

Cleave {1}{U}{U} (You may cast this spell for its cleave cost. If you do, remove the words in square brackets.)
Counter target spell [that wasn't cast from its owner's hand].

Whispering Wizard

Spirit

Whenever you cast a noncreature spell, create a 1/1 white Spirit creature token with flying. This ability triggers only once each turn.

Innistrad: Crimson Vow