Mana Tithe

Counter target spell unless its controller pays {1}.

Brown Ouphe

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

Psionic Blast

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

Sandstorm

Sandstorm deals 1 damage to each attacking creature.

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.

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.)

Permeating Mass

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

Storm Seeker

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

Borrowing the East Wind

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

Bee Sting

Active Volcano

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

Darkness

Prevent all combat damage that would be dealt this turn.

Koskun Falls

At the beginning of your upkeep, sacrifice Koskun Falls 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.

Plow Under

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

Pyroblast

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

Avoid Fate

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

Smoke

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

Winter Blast

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

Red Elemental Blast

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

Withering Boon

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

Hornet Sting

Hornet Sting deals 1 damage to any target.

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 artifact: Draw a card.")

Fanatical Devotion

Sacrifice a creature: Regenerate target creature.

Onslaught

Whenever you cast a creature spell, tap target creature.

An-Zerrin Ruins

As An-Zerrin Ruins enters, choose a creature type.
Creatures of the chosen type don't untap during their controllers' untap steps.

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 Stingscourger enters, return target creature an opponent controls to its owner's hand.

Seedtime

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

Debt of Loyalty

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

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.

Bind

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