Serum Visions

Compelling Argument

Target player mills five cards.
Cycling {U} ({U}, Discard this card: Draw a card.)

Dream Twist

Target player mills three cards.
Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Drowner Initiate

Whenever a player casts a blue spell, you may pay {1}. If you do, target player mills two cards.

Screeching Sliver

All Slivers have "{T}: Target player mills a card."

Jace's Erasure

Whenever you draw a card, you may have target player mill a card.

Merfolk Thaumaturgist

{T}: Switch target creature's power and toughness until end of turn.

Merfolk Mesmerist

Rootwater Hunter

{T}: Rootwater Hunter deals 1 damage to any target.

Sunscorched Desert

When Sunscorched Desert enters, it deals 1 damage to target player or planeswalker.
{T}: Add {C}.

Tome Scour

Prodigal Sorcerer

{T}: Prodigal Sorcerer deals 1 damage to any target.

Evanescent Intellect

Enchant creature
Enchanted creature has "{1}{U}, {T}: Target player mills three cards."

Didn't Say Please

Counter target spell. Its controller mills three cards.

Sleeper Dart

When Sleeper Dart enters, draw a card.
{T}, Sacrifice Sleeper Dart: Target creature doesn't untap during its controller's next untap step.

Zuran Spellcaster

{T}: Zuran Spellcaster deals 1 damage to any target.

Vessel of Endless Rest

When Vessel of Endless Rest enters, put target card from a graveyard on the bottom of its owner's library.
{T}: Add one mana of any color.

Negate

Relic of Progenitus

{T}: Target player exiles a card from their graveyard.
{1}, Exile Relic of Progenitus: Exile all graveyards. Draw a card.

Cathartic Adept

Mind Sculpt

Thornwind Faeries

Flying
{T}: Thornwind Faeries deals 1 damage to any target.

Disruptive Pitmage

{T}: Counter target spell unless its controller pays {1}.
Morph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Iceberg Cancrix

Whenever another snow permanent you control enters, you may have target player mill two cards.

Viridian Longbow

Equipped creature has "{T}: This creature deals 1 damage to any target."
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)

Scuttlemutt

{T}: Add one mana of any color.
{T}: Target creature becomes the color or colors of your choice until end of turn.

Deepmuck Desperado

Whenever you commit a crime, each opponent mills three cards. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Sage's Row Denizen

Whenever another blue creature you control enters, target player mills two cards.

Vedalken Entrancer

Abjure

As an additional cost to cast this spell, sacrifice a blue permanent.
Counter target spell.

Thought Collapse

Peek

Look at target player's hand.
Draw a card.

Preordain

Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Disruptive Student

{T}: Counter target spell unless its controller pays {1}.

Glasses of Urza

Counterspell

Hermetic Study

Enchant creature
Enchanted creature has "{T}: This creature deals 1 damage to any target."

Ravenform

Exile target artifact or creature. Its controller creates a 1/1 blue Bird creature token with flying.
Foretell {U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Dampen Thought

Target player mills four cards.
Splice onto Arcane {1}{U} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)