Pyroblast

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

Fanatical Devotion

Sacrifice a creature: Regenerate target creature.

Storm Seeker

Storm Seeker deals damage to target player equal to the number of cards in that player's hand.

An-Zerrin Ruins

As this enchantment enters, choose a creature type.
Creatures of the chosen type don't untap during their controllers' untap steps.

Onslaught

Whenever you cast a creature spell, tap target creature.

Plow Under

Put two target lands on top of their owners' libraries.

Bind

Counter target activated ability. (Mana abilities can't be targeted.)
Draw a card.

Bee Sting

Brown Ouphe

{1}{G}, {T}: Counter target activated ability from an artifact source. (Mana abilities can't be targeted.)

Withering Boon

As an additional cost to cast this spell, pay 3 life.
Counter target creature spell.

Psionic Blast

Psionic Blast deals 4 damage to any target and 2 damage to you.

Borrowing the East Wind

Borrowing the East Wind deals X damage to each creature with horsemanship and each player.

Gone Missing

Put target permanent on top of its owner's library.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Choking Vines

Cast this spell only during the declare blockers step.
X target attacking creatures become blocked. Choking Vines deals 1 damage to each of those creatures. (This spell works on creatures that can't be blocked.)

Koskun Falls

At the beginning of your upkeep, sacrifice this enchantment unless you tap an untapped creature you control.
Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Sandstorm

Sandstorm deals 1 damage to each attacking creature.

Seedtime

Cast this spell only during your turn.
Take an extra turn after this one if an opponent cast a blue spell this turn.

Permeating Mass

Whenever this creature deals combat damage to a creature, that creature becomes a copy of this creature.

Smoke

Players can't untap more than one creature during their untap steps.

Debt of Loyalty

Regenerate target creature. You gain control of that creature if it regenerates this way.

Stingscourger

Echo {3}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, return target creature an opponent controls to its owner's hand.

Red Elemental Blast

Choose one —
• Counter target blue spell.
• Destroy target blue permanent.

Darkness

Prevent all combat damage that would be dealt this turn.

Active Volcano

Choose one —
• Destroy target blue permanent.
• Return target Island to its owner's hand.

Cleansing Wildfire

Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.
Draw a card.

Hornet Sting

Hornet Sting deals 1 damage to any target.

Mana Tithe

Counter target spell unless its controller pays {1}.

Tibalt's Trickery

Counter target spell. Choose 1, 2, or 3 at random. Its controller mills that many cards, then exiles cards from the top of their library until they exile a nonland card with a different name than that spell. They may cast that card without paying its mana cost. Then they put the exiled cards on the bottom of their library in a random order.

Avoid Fate

Counter target instant or Aura spell that targets a permanent you control.

Winter Blast

Tap X target creatures. Winter Blast deals 2 damage to each of those creatures with flying.