Patron Wizard

Tap an untapped Wizard you control: Counter target spell unless its controller pays {1}.

Wash Out

Return all permanents of the color of your choice to their owners' hands.

Supreme Inquisitor

Tap five untapped Wizards you control: Search target player's library for up to five cards and exile them. Then that player shuffles.

Counterspell

Boomerang

Return target permanent to its owner's hand.

Island

Voidmage Prodigy

{U}{U}, Sacrifice a Wizard: Counter target spell.
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.)

Information Dealer

{T}: Look at the top X cards of your library, where X is the number of Wizards on the battlefield, then put them back in any order.

Long-Term Plans

Search your library for a card, then shuffle and put that card third from the top.

Raven Guild Master

Whenever Raven Guild Master deals combat damage to a player, that player exiles the top ten cards of their library.
Morph {2}{U}{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.)

Imagecrafter

{T}: Choose a creature type other than Wall. Target creature becomes that type until end of turn.

Hapless Researcher

Sacrifice Hapless Researcher: Draw a card, then discard a card.

Crafty Pathmage

{T}: Target creature with power 2 or less can't be blocked this turn.

Peer Pressure

Choose a creature type. If you control more creatures of that type than each other player, you gain control of all creatures of that type. (This effect lasts indefinitely.)