Disallow

Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)

Dovin's Veto

This spell can't be countered.
Counter target noncreature spell.

Reinterpret

Counter target spell. You may cast a spell with equal or lesser mana value from your hand without paying its mana cost.

Frilled Mystic

Flash
When Frilled Mystic enters, you may counter target spell.

Essence Backlash

Counter target creature spell. Essence Backlash deals damage equal to that spell's power to its controller.

Stern Scolding

Counter target creature spell with power or toughness 2 or less.

Counterspell

Lay Bare

Counter target spell. Look at its controller's hand.

Counterflux

This spell can't be countered.
Counter target spell you don't control.
Overload {1}{U}{U}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Neutralize

Counter target spell.
Cycling {2} ({2}, Discard this card: Draw a card.)

Sinister Sabotage

Counter target spell.
Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Mindswipe

Counter target spell unless its controller pays {X}. Mindswipe deals X damage to that spell's controller.

Turn Aside

Counter target spell that targets a permanent you control.

Negate

Condescend

Counter target spell unless its controller pays {X}. 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.)

Rebuff the Wicked

Dispel

Clash of Wills

Counter target spell unless its controller pays {X}.

Psychic Rebuttal

Counter target instant or sorcery spell that targets you.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you may copy the spell countered this way. You may choose new targets for the copy.

Exclude

Counter target creature spell.
Draw a card.

Dissolve

Counter target spell. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Unwind

Counter target noncreature spell. Untap up to three lands.

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

An Offer You Can't Refuse

Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this token: Add one mana of any color.")

Hornswoggle

Counter target creature spell. You create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Broken Concentration

Counter target spell.
Madness {3}{U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Absorb

Countersquall

Counter target noncreature spell. Its controller loses 2 life.

Essence Scatter

Lose Focus

Replicate {U} (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)
Counter target spell unless its controller pays {2}.

Mystic Genesis

Counter target spell. Create an X/X green Ooze creature token, where X is that spell's mana value.

Rewind

Counter target spell. Untap up to four lands.

Ionize

Counter target spell. Ionize deals 2 damage to that spell's controller.

Tale's End

Counter target activated ability, triggered ability, or legendary spell.

Dismiss

Wizard's Retort

This spell costs {1} less to cast if you control a Wizard.
Counter target spell.

Mana Leak

Counter target spell unless its controller pays {3}.

Mana Tithe

Counter target spell unless its controller pays {1}.

Mystical Dispute

This spell costs {2} less to cast if it targets a blue spell.
Counter target spell unless its controller pays {3}.

Soul Manipulation

Choose one or both —
• Counter target creature spell.
• Return target creature card from your graveyard to your hand.

Render Silent

Counter target spell. Its controller can't cast spells this turn.

Didn't Say Please

Counter target spell. Its controller mills three cards.

Lapse of Certainty

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

Cancel

Traumatic Visions

Counter target spell.
Basic landcycling {1}{U} ({1}{U}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Disdainful Stroke

Counter target spell with mana value 4 or greater.

Arcane Denial

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.
You draw a card at the beginning of the next turn's upkeep.

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.

You Find the Villains' Lair

Choose one —
• Foil Their Scheme — Counter target spell.
• Learn Their Secrets — Draw two cards, then discard two cards.