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Aquus Steed
{3}{U}
Creature -- Beast
1/3
{2}{U}, {T}: Target creature gets -2/-0 until end of turn.

Befuddle
{2}{U}
Instant
Target creature gets -4/-0 until end of turn.
Draw a card.

Bewilder
{2}{U}
Instant
Target creature gets -3/-0 until end of turn.
Draw a card.

Chain to Memory
{U}
Instant
Target creature gets -4/-0 until end of turn. Scry 2.

Code of Constraint
{2}{U}
Instant
Target creature gets -4/-0 until end of turn.
Draw a card.
Addendum -- If you cast ~this~ during your main phase, tap that creature and it doesn't untap during its controller's next untap step.

Constricting Tendrils
{U}
Instant
Target creature gets -3/-0 until end of turn.
Cycling {2} ({2}, Discard ~this~: Draw a card.)

Dazzling Lights
{U}
Instant
Target creature gets -3/-0 until end of turn.
Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Disorient
{3}{U}
Instant
Target creature gets -7/-0 until end of turn.

Dizzy Spell
{U}
Instant
Target creature gets -3/-0 until end of turn.
Transmute {1}{U}{U} ({1}{U}{U}, Discard ~this~: Search your library for a card with the same mana value as ~this~, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Fleeting Distraction
{U}
Instant
Target creature gets -1/-0 until end of turn.
Draw a card.

Hydrosurge
{U}
Instant
Target creature gets -5/-0 until end of turn.

Jace's Scrutiny
{1}{U}
Instant
Target creature gets -4/-0 until end of turn.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice ~this~: Draw a card.")

Lost in a Labyrinth
{U}
Instant
Target creature gets -3/-0 until end of turn. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)