Snow-Covered Island

Boreal Druid

Ohran Viper

Whenever Ohran Viper deals combat damage to a creature, destroy that creature at end of combat.
Whenever Ohran Viper deals combat damage to a player, you may draw a card.

Joraga Auxiliary

{4}{G}{W}: Support 2. (Put a +1/+1 counter on each of up to two other target creatures.)

Snow-Covered Forest

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.

Rime Tender

{T}: Untap another target snow permanent.

Rimewood Falls

({T}: Add {G} or {U}.)
Rimewood Falls enters tapped.

Icehide Golem

({S} can be paid with one mana from a snow source.)

Snow-Covered Swamp

Woodland Chasm

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

Ice Tunnel

({T}: Add {U} or {B}.)
Ice Tunnel enters tapped.

Ice-Fang Coatl

Flash
Flying
When Ice-Fang Coatl enters, draw a card.
Ice-Fang Coatl has deathtouch as long as you control at least three other snow permanents.