Woodland Chasm

({T}: Add {B} or {G}.)
Woodland Chasm enters tapped.

Snow-Covered Swamp

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Sulfurous Mire

({T}: Add {B} or {R}.)
Sulfurous Mire enters tapped.

Breath Weapon

Breath Weapon deals 2 damage to each non-Dragon creature.

Cast Down

Elvish Visionary

When Elvish Visionary enters, draw a card.

Snow-Covered Mountain

Highland Forest

({T}: Add {R} or {G}.)
Highland Forest enters tapped.

Sculptor of Winter

Annoyed Altisaur

Reach, trample
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Boarding Party

Haste
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Skred

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

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Snow-Covered Forest

Jewel Thief

Vigilance, trample
When Jewel Thief enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Deadly Dispute

As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")