Force of Will

You may pay 1 life and remove a blue card in your hand from the game instead of paying Force of Will's casting cost. Effects that prevent or redirect damage cannot be used to counter this loss of life. Counter target spell.

Cavern of Souls

As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {1} to your mana pool. {T}: Add one mana of any color to your mana pool. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Dack Fayden

+1: Target player draws two cards, then discards two cards. -2: Gain control of target artifact. -6: You get an emblem with "Whenever you cast a spell that targets one or more permanents, gain control of those permanents."

Monastery Mentor

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever you cast a noncreature spell, put a 1/1 white Monk creature token with prowess onto the battlefield.

Merchant Scroll

Search your library for a blue instant or interrupt. Reveal that card to all players and put it into your hand. Reshuffle your library afterwards.

Snow-Covered Island

{T}: Add {U} to your mana pool.

Pyroblast

Counter target spell if it is blue or destroy target permanent if it is blue.

Snapcaster Mage

Flash When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Dig Through Time

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Look at the top seven cards of your library. Put two of them into your hand and the rest on the bottom of your library in any order.

Treasure Cruise

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Draw three cards.

Young Pyromancer

Whenever you cast an instant or sorcery spell, put a 1/1 red Elemental creature token onto the battlefield.

Gush

You may return two islands you control to their owner's hand instead of paying Gush's mana cost. Draw two cards.

Mental Misstep

({U/P} can be paid with either {U} or 2 life.) Counter target spell with converted mana cost 1.

Ponder

Gitaxian Probe

({U/P} can be paid with either {U} or 2 life.) Look at target player's hand. Draw a card.

Volcanic Island

Counts as both islands and mountains and is affected by spells that affect either. Tap to add either {U} or {R} to your mana pool.

Mox Sapphire

Add 1 blue mana to your mana pool. Tapping this artifact can be played as an interrupt.

Time Walk

Take an extra turn after this one.

Tundra

Counts as both islands and plains and is affected by spells that affect either. Tap to add either {U} or {W} to your mana pool.

Mox Ruby

Add 1 red mana to your mana pool. Tapping this artifact can be played as an interrupt.

Mox Pearl

Add 1 white mana to your mana pool. Tapping this artifact can be played as an interrupt.

Ancestral Recall

Draw 3 cards or force opponent to draw 3 cards.

Swords to Plowshares

Target creature is removed from game entirely; return to owner's deck only when game is over. Creature's controller gains life points equal to creature's power.

Black Lotus

Adds 3 mana of any single color of your choice to your mana pool, then is discarded. Tapping this artifact can be played as an interrupt.

Jace, the Mind Sculptor

+2: Look at the top card of target player's library. You may put that card on the bottom of that player's library. 0: Draw three cards, then put two cards from your hand on top of your library in any order. -1: Return target creature to its owner's hand. -12: Exile all cards from target player's library, then that player shuffles his or her hand into his or her library.

Mindbreak Trap

If an opponent cast three or more spells this turn, you may pay {0} rather than pay Mindbreak Trap's mana cost. Exile any number of target spells.

Flooded Strand

Misty Rainforest

Polluted Delta

Brainstorm

Preordain

Skullclamp

Strip Mine

Wasteland

Lavinia, Azorius Renegade

Each opponent can't cast noncreature spells with converted mana cost greater than the number of lands that player controls. Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.