Lava Dart

Lava Dart deals 1 damage to any target.
Flashback—Sacrifice a Mountain. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Counterspell

Winter's Rest

Enchant creature
When Winter's Rest enters, tap enchanted creature.
As long as you control another snow permanent, enchanted creature doesn't untap during its controller's untap step.

Dizzy Spell

Target creature gets -3/-0 until end of turn.
Transmute {1}{U}{U} ({1}{U}{U}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Ghoulcaller's Bell

Blue Elemental Blast

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

Shenanigans

Destroy target artifact.
Dredge 1 (If you would draw a card, you may mill a card instead. If you do, return this card from your graveyard to your hand.)

Brainstorm

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

Screeching Sliver

All Slivers have "{T}: Target player mills a card."

Volatile Fjord

({T}: Add {U} or {R}.)
Volatile Fjord enters tapped.

Snow-Covered Island

End the Festivities

End the Festivities deals 1 damage to each opponent and each creature and planeswalker they control.

Steel Sabotage

Choose one —
• Counter target artifact spell.
• Return target artifact to its owner's hand.

Orcish Spy

{T}: Look at the top three cards of target player's library.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Skred

Skred deals damage to target creature equal to the number of snow permanents you control.

Snow-Covered Mountain

Lórien Revealed

Draw three cards.
Islandcycling {1} ({1}, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)

Cathartic Adept

Turn Aside

Counter target spell that targets a permanent you control.

Red Elemental Blast

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

Mizzium Skin

Target creature you control gets +0/+1 and gains hexproof until end of turn.
Overload {1}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")