Didn't Say Please

Counter target spell. Its controller mills three cards.

Pestermite

Flash
Flying
When Pestermite enters, you may tap or untap target permanent.

Spell Pierce

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

Spellstutter Sprite

Flash
Flying
When Spellstutter Sprite enters, counter target spell with mana value X or less, where X is the number of Faeries you control.

Force Spike

Counter target spell unless its controller pays {1}.

Fire

Fire deals 2 damage divided as you choose among one or two targets.

Fire // Ice

Annul

Counter target artifact or enchantment spell.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Persistent Petitioners

{1}, {T}: Target player mills a card. (They put the top card of their library into their graveyard.)
Tap four untapped Advisors you control: Target player mills twelve cards.
A deck can have any number of cards named Persistent Petitioners.

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}.

Island

Hydroblast

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Send to Sleep

Tap up to two target creatures.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, those creatures don't untap during their controllers' next untap steps.

Exclude

Counter target creature spell.
Draw a card.

Counterspell

Repulse

Return target creature to its owner's hand.
Draw a card.

Boomerang

Return target permanent to its owner's hand.

Spire Golem

Affinity for Islands (This spell costs {1} less to cast for each Island you control.)
Flying

Glacial Grasp

Tap target creature. Its controller mills two cards. That creature doesn't untap during its controller's next untap step. (They put the top two cards of their library into their graveyard.)
Draw a card.

Accumulated Knowledge

Draw a card, then draw cards equal to the number of cards named Accumulated Knowledge in all graveyards.