Sylvan Caryatid

Defender, hexproof
{T}: Add one mana of any color.

Snow-Covered Island

Glacial Floodplain

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

Arcades, the Strategist

Flying, vigilance
Whenever a creature you control with defender enters, draw a card.
Each creature you control with defender assigns combat damage equal to its toughness rather than its power and can attack as though it didn't have defender.

Ice-Fang Coatl

Flash
Flying
When this creature enters, draw a card.
This creature has deathtouch as long as you control at least three other snow permanents.

Into the North

Search your library for a snow land card, put it onto the battlefield tapped, then shuffle.

Tower Defense

Creatures you control get +0/+5 and gain reach until end of turn.

Wall of Blossoms

Defender
When this creature enters, draw a card.

Perimeter Captain

Defender
Whenever a creature you control with defender blocks, you may gain 2 life.

Rimewood Falls

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

Tree of Redemption

Defender
{T}: Exchange your life total with this creature's toughness.

Snow-Covered Plains

Dawn

Aftermath (Cast this spell only from your graveyard. Then exile it.)
Return all creature cards with power 2 or less from your graveyard to your hand.

Dusk

Destroy all creatures with power 3 or greater.

Dusk // Dawn

Ephemerate

Exile target creature you control, then return it to the battlefield under its owner's control.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Angelic Wall

Defender (This creature can't attack.)
Flying

Wall of Denial

Defender, flying
Shroud (This creature can't be the target of spells or abilities.)

Slaughter the Strong

Each player chooses any number of creatures they control with total power 4 or less, then sacrifices all other creatures they control.

Arctic Treeline

({T}: Add {G} or {W}.)
This land enters tapped.

Faceless Haven

{T}: Add {C}.
{S}{S}{S}: This land becomes a 4/3 creature with vigilance and all creature types until end of turn. It's still a land. ({S} can be paid with one mana from a snow source.)