Counterspell

Skred

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

Screeching Sliver

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

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Steel Sabotage

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

Winter's Rest

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

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.)

Snow-Covered Mountain

Brainstorm

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

End the Festivities

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

Volatile Fjord

({T}: Add {U} or {R}.)
This land enters tapped.

Blue Elemental Blast

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

Ghoulcaller's Bell

Red Elemental Blast

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

Orcish Spy

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

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.)

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.)

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.)

Cathartic Adept

Snow-Covered Island

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.")