Trample

Abominable Treefolk's power and toughness are each equal to the number of snow permanents you control.

When Abominable Treefolk enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Flying, vigilance

{T}: When target creature other than Adarkar Valkyrie dies this turn, return that card to the battlefield under your control.

{T}: Add one mana of any color in your commander's color identity.

Arctic Flats enters the battlefield tapped.

{T}: Add {G} or {W}.

({T}: Add {G} or {W}.)

Arctic Treeline enters the battlefield tapped.

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

When Arcum's Astrolabe enters the battlefield, draw a card.

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

{S}{S}: Ascendant Spirit becomes a Spirit Warrior with base power and toughness 2/3.

{S}{S}{S}: If Ascendant Spirit is a Warrior, put a flying counter on it and it becomes a Spirit Warrior Angel with base power and toughness 4/4.

{S}{S}{S}{S}: If Ascendant Spirit is an Angel, put two +1/+1 counters on it and it gains "Whenever this creature deals combat damage to a player, draw a card."

{2}: Target snow land you control becomes a 4/4 Elemental creature with hexproof and haste until end of turn. It's still a land. (A creature with hexproof can't be the target of spells or abilities your opponents control.)

Destroy target permanent. Its controller creates a 3/3 green Beast creature token.

Distribute X +1/+1 counters among any number of creatures you control, where X is the amount of {S} spent to cast this spell. Then draw a card for each creature you control with power 4 or greater.

Choose target creature you control and target creature you don't control. If you control three or more snow permanents, the creature you control gets +1/+0 and gains indestructible until end of turn. Then those creatures fight each other. (Each deals damage equal to its power to the other.)

Whenever you cast a creature spell, if {S} of any of that spell's colors was spent to cast it, that creature enters the battlefield with an additional +1/+1 counter on it. ({S} is mana from a snow source.)

Boreal Shelf enters the battlefield tapped.

{T}: Add {W} or {U}.

Whenever an opponent plays a land, you may put a land card from your hand onto the battlefield.

Coldsteel Heart enters the battlefield tapped.

As Coldsteel Heart enters the battlefield, choose a color.

{T}: Add one mana of the chosen color.

You may play lands from your graveyard.

{T}: Choose target nonland permanent card in your graveyard. If you haven't cast a spell this turn, you may cast that card. If you do, you can't cast additional spells this turn. Activate only as a sorcery.

Roll a d20.

1--9 | Tap all creatures your opponents control.

10--19 | Tap all creatures your opponents control. Those creatures don't untap during their controllers' next untap steps.

20 | Tap all creatures your opponents control. Those creatures don't untap during their controllers' next untap steps. Until your next turn, creatures your opponents control enter the battlefield tapped.

Trample

{3}{G}: Conifer Wurm gets +X/+X until end of turn, where X is the number of snow permanents you control.

Counter target spell.

Cumulative upkeep {S} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it. {S} can be paid with one mana from a snow source.)

If a creature would deal combat damage to you and/or one or more creatures you control, prevent X of that damage, where X is the number of age counters on Cover of Winter.

{S}: Put an age counter on Cover of Winter.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Dark Depths enters the battlefield with ten ice counters on it.

{3}: Remove an ice counter from Dark Depths.

When Dark Depths has no ice counters on it, sacrifice it. If you do, create Marit Lage, a legendary 20/20 black Avatar creature token with flying and indestructible.

Flying

{1}{S}: Snow creatures you control get +1/+1 until end of turn. ({S} can be paid with one mana from a snow source.)

You may play an additional land on each of your turns.

{T}: Add {C}.

{S}{S}{S}: Faceless Haven 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.)

Choose one or more --

• Exile all artifacts.

• Exile all creatures.

• Exile all enchantments.

• Exile all graveyards.

Tap target creature an opponent controls and put three stun counters on it. Scry 2. (If a permanent with a stun counter would become untapped, remove one from it instead.)

{S}, {T}: Look at the top card of your library. If it's a snow card, you may reveal it and put it into your hand. ({S} can be paid with one mana from a snow source.)

{T}: Add {C}.

{1}{S}: Until end of turn, Frostwalk Bastion becomes a 2/3 Construct artifact creature. It's still a land. ({S} can be paid with one mana from a snow source.)

Whenever Frostwalk Bastion deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step.

({T}: Add {W} or {U}.)

Glacial Floodplain enters the battlefield tapped.

Enchant creature

Cumulative upkeep {S} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it. {S} can be paid with one mana from a snow source.)

Enchanted creature gets +3/+3 for each age counter on Glacial Plating.

Reveal the top six cards of your library. You may put any number of snow permanent cards from among them into your hand. Put the rest into your graveyard.

Scry X, where X is the amount of {S} spent to cast this spell, then draw three cards. ({S} is mana from a snow source.)

Draw a card. You may put a land card from your hand onto the battlefield.

If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead.

{2}, {T}: Return target permanent to its owner's hand. Activate only if you control four or more snow permanents.

Whenever you tap an untapped creature an opponent controls, you may pay {1}. When you do, choose one --

• Create a 4/4 white and blue Elemental creature token.

• Put a +1/+1 counter on each creature you control.

• Scry 2, then draw a card.

{1}, {T}: Tap target creature. This ability costs {1} less to activate during your turn.

{3}, Sacrifice Hylda's Crown of Winter: Draw a card for each tapped creature your opponents control.

Flash

Flying

When Ice-Fang Coatl enters the battlefield, draw a card.

Ice-Fang Coatl has deathtouch as long as you control at least three other snow permanents.

Whenever another snow permanent enters the battlefield under your control, you may have target player mill two cards.

{S}, {T}: Tap target artifact or creature. ({S} can be paid with one mana from a snow source.)

This spell costs {1} less to cast for each snow land you control.

When Icebreaker Kraken enters the battlefield, artifacts and creatures target opponent controls don't untap during that player's next untap step.

Return three snow lands you control to their owner's hand: Return Icebreaker Kraken to its owner's hand.

You may look at the top card of your library any time.

You may play snow lands and cast snow spells from the top of your library.

Whenever another snow permanent enters the battlefield under your control, you may pay {G}, {W}, or {U}. If you do, put a +1/+1 counter on Isu the Abominable.

Kicker {G} (You may pay an additional {G} as you cast this spell.)

Scry 2, then draw a card. If this spell was kicked, you may put a land card from your hand onto the battlefield.

Reach

Whenever another permanent enters the battlefield under your control, if it wasn't put onto the battlefield with this ability, you may put a permanent card with equal or lesser mana value from your hand onto the battlefield.

Partner (You can have two commanders if both have partner.)

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

This spell can't be countered.

Draw cards equal to the greatest toughness among creatures you control, then put any number of creature cards from your hand onto the battlefield.

Whenever Marit Lage's Slumber or another snow permanent enters the battlefield under your control, scry 1.

At the beginning of your upkeep, if you control ten or more snow permanents, sacrifice Marit Lage's Slumber. If you do, create Marit Lage, a legendary 20/20 black Avatar creature token with flying and indestructible.

Changeling (This card is every creature type.)

You may have Moritte of the Frost enter the battlefield as a copy of a permanent you control, except it's legendary and snow in addition to its other types and, if it's a creature, it enters with two additional +1/+1 counters on it and has changeling.

{T}: Add {C}.

{4}{S}, {T}, Sacrifice Mouth of Ronom: It deals 4 damage to target creature. ({S} can be paid with one mana from a snow source.)

Attacking creatures you control have deathtouch.

Whenever a creature you control deals combat damage to a player, draw a card.

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.

Enchant snow land you control

When On Thin Ice enters the battlefield, exile target creature an opponent controls until On Thin Ice leaves the battlefield.

If one or more +1/+1 counters would be put on an artifact or creature you control, that many plus one +1/+1 counters are put on it instead.

{1}{G}, {T}: Put a +1/+1 counter on target artifact or creature you control. Activate only as a sorcery.

Cycling {2} ({2}, Discard this card: Draw a card.)

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Tap up to one target creature. Scry 1, then draw a card.

You have no maximum hand size.

{T}: Add {C}.

{T}: Add one mana of any color.

At the beginning of your upkeep, put a night counter on Replicating Ring. Then if it has eight or more night counters on it, remove all of them and create eight colorless snow artifact tokens named Replicated Ring with "{T}: Add one mana of any color."

{T}: Untap another target snow permanent.

Flying

Rimefeather Owl's power and toughness are each equal to the number of snow permanents on the battlefield.

{1}{S}: Put an ice counter on target permanent.

Permanents with ice counters on them are snow.

{1}, {T}: Counter target activated ability. Activate only if you control four or more snow permanents. (Mana abilities can't be targeted.)

{1}, {T}: You may tap or untap target permanent. Activate only if you control four or more snow permanents.

({T}: Add {G} or {U}.)

Rimewood Falls enters the battlefield tapped.

Rivendell enters the battlefield tapped unless you control a legendary creature.

{T}: Add {U}.

{1}{U}, {T}: Scry 2. Activate only if you control a legendary creature.

{T}: Add {C}.

{4}, {T}: Target creature can't be blocked this turn.

{T}: Add {C}.

{1}{S}, {T}: Look at the top card of your library. If that card is snow, you may reveal it and put it into your hand. ({S} can be paid with one mana from a snow source.)

{T}: Untap target snow land.

Search your library for a snow permanent card, a legendary card, or a Saga card, reveal it, put it into your hand, then shuffle. You gain 1 life for each {S} spent to cast this spell. ({S} is mana from a snow source.)

{1}: Look at the top three cards of your library, then put them back in any order.

{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

Shimmerdrift Vale enters the battlefield tapped.

As Shimmerdrift Vale enters the battlefield, choose a color.

{T}: Add one mana of the chosen color.

Enchant creature

Enchanted creature has flying.

Enchanted creature has first strike as long as it's blocking and you control a snow land.

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

Flying

At the beginning of your postcombat main phase, there is an additional beginning phase after this phase. (The beginning phase includes the untap, upkeep, and draw steps.)

When Spirit of the Aldergard enters the battlefield, search your library for a snow land card, reveal it, put it into your hand, then shuffle.

Spirit of the Aldergard gets +1/+0 for each other snow permanent you control.

Ward {3}

Other creatures you control have ward {3}.

Whenever Storvald enters the battlefield or attacks, choose one or both --

• Target creature has base power and toughness 7/7 until end of turn.

• Target creature has base power and toughness 1/1 until end of turn.

Tap one or two target creatures an opponent controls. Put a stun counter on each of them. (If a permanent with a stun counter would become untapped, remove one from it instead.)

{2}, Sacrifice a snow land: Prevent all combat damage that would be dealt this turn.

This spell can't be countered.

Destroy all creatures.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)

Equip {1}

Exile target creature. Its controller gains life equal to its power.

Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life and draw a card.

Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.

At the beginning of combat on your turn, if The Ozolith has counters on it, you may move all counters from The Ozolith onto target creature.

At the beginning of your upkeep, scry 2.

Whenever you choose to put one or more cards on the bottom of your library while scrying, exile that many cards from the bottom of your library.

During your turn, you may play cards exiled with The Temporal Anchor.

Paradox -- Whenever you cast a spell from anywhere other than your hand, put a +1/+1 counter on target creature.

Team TARDIS -- At the beginning of your end step, untap each creature you control with a counter on it.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Mill three cards.

II -- Return up to two target snow permanent cards from your graveyard to your hand.

III -- Choose three cards in each graveyard. Their owners shuffle those cards into their libraries.

{T}: Add {C}.

{2}, {T}: Thespian's Stage becomes a copy of target land, except it has this ability.

Flying

Whenever you cast a spell from anywhere other than your hand, draw a card.

Each land is a Forest in addition to its other land types.