Coldsteel Heart enters the battlefield tapped. As Coldsteel Heart enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) As Obelisk of Urd enters the battlefield, choose a creature type. Creatures you control of the chosen type get +2/+2.

{4}, {T}, Discard your hand: Draw a card for each creature you control.

{T}: Add {C}{C}.

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 Whenever Blizzard Specter deals combat damage to a player, choose one — • That player returns a permanent they control to its owner's hand. • That player discards a card.

Flash Flying When Blizzard Strix enters the battlefield, if you control another snow permanent, exile target permanent other than Blizzard Strix. Return that card to the battlefield under its owner's control at the beginning of the next end step.

At the beginning of your upkeep, if you control a black permanent, you may put a +1/+1 counter on Bloodhall Ooze. At the beginning of your upkeep, if you control a green permanent, you may put a +1/+1 counter on Bloodhall Ooze.

{T}: Add {C}.

{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Flying {S}: Chilling Shade gets +1/+1 until end of turn. ({S} can be paid with one mana from a snow source.)

Vigilance Whenever you cast a creature spell, draw a card, then you may put a land card from your hand onto the battlefield. {3}, {T}: Return target creature you control to its owner's hand.

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

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

Whenever Corrosive Ooze blocks or becomes blocked by an equipped creature, destroy all Equipment attached to that creature at end of combat.

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.)

When Golos, Tireless Pilgrim enters the battlefield, you may search your library for a land card, put that card onto the battlefield tapped, then shuffle. {2}{W}{U}{B}{R}{G}: Exile the top three cards of your library. You may play them this turn without paying their mana costs.

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

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.

Delirium — Whenever Inexorable Blob attacks, if there are four or more card types among cards in your graveyard, create a 3/3 green Ooze creature token that's tapped and attacking.

Whenever you cast a spell, Manaplasm gets +X/+X until end of turn, where X is that spell's mana value.

As Metallic Mimic enters the battlefield, choose a creature type. Metallic Mimic is the chosen type in addition to its other types. Each other creature you control of the chosen type enters the battlefield with an additional +1/+1 counter on it.

When Mitotic Slime dies, create two 2/2 green Ooze creature tokens. They have "When this creature dies, create two 1/1 green Ooze creature tokens."

{T}, Sacrifice another creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery.

Ravenous Slime can't be blocked by creatures with power 2 or less. If a creature an opponent controls would die, instead exile it and put a number of +1/+1 counters equal to that creature's power on Ravenous Slime.

{T}: Untap another target snow permanent.

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

{G}: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on Scavenging Ooze and you gain 1 life.

Sisay, Weatherlight Captain gets +1/+1 for each color among other legendary permanents you control. {W}{U}{B}{R}{G}: Search your library for a legendary permanent card with mana value less than Sisay's power, put that card onto the battlefield, then shuffle.

Slurrk, All-Ingesting enters the battlefield with five +1/+1 counters on it. Whenever Slurrk or another creature you control dies, if it had a +1/+1 counter on it, put a +1/+1 counter on each creature you control that has a +1/+1 counter on it. Partner (You can have two commanders if both have partner.)

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

As The Mimeoplasm enters the battlefield, you may exile two creature cards from graveyards. If you do, it enters the battlefield as a copy of one of those cards with a number of additional +1/+1 counters on it equal to the power of the other card.

At the beginning of your upkeep, destroy another nonland permanent chosen at random, then put a number of +1/+1 counters on Yule Ooze equal to that permanent's converted mana cost. {R}{G}, Eat some food: Regenerate Yule Ooze.

Enchant creature Enchanted creature has flying. Sacrifice Crown of Ascension: Enchanted creature and other creatures that share a creature type with it gain flying until end of turn.

As Etchings of the Chosen enters the battlefield, choose a creature type. Creatures you control of the chosen type get +1/+1. {1}, Sacrifice a creature of the chosen type: Target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Enchant creature Enchanted creature can't block, and its activated abilities can't be activated. {S}: Enchanted creature gains defender until end of turn. ({S} can be paid with one mana from a snow source.)

Whenever a nontoken creature you control dies, put a slime counter on Gutter Grime, then create a green Ooze creature token with "This creature's power and toughness are each equal to the number of slime counters on Gutter Grime."

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.

{1}{G}, Remove one or more +1/+1 counters from among creatures you control: Create an X/X green Ooze creature token, where X is the number of +1/+1 counters removed this way.

{1}{G}, Sacrifice a non-Ooze creature: Create an X/X green Ooze creature token, where X is the sacrificed creature's power. Activate only as a sorcery.

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

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

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

Arctic Flats enters the battlefield tapped. {T}: Add {G} or {W}.

Boreal Shelf enters the battlefield tapped. {T}: Add {W} or {U}.

({T}: Add {R} or {G}.) Cinder Glade enters the battlefield tapped unless you control two or more basic lands.

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

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.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

{T}: Add one mana of any color that a land an opponent controls could produce.

Frost Marsh enters the battlefield tapped. {T}: Add {U} or {B}.

{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.

Highland Weald enters the battlefield tapped. {T}: Add {R} or {G}.

Each noncreature artifact you control is an artifact creature with power and toughness each equal to its mana value.

Krosan Verge enters the battlefield tapped. {T}: Add {C}. {2}, {T}, Sacrifice Krosan Verge: Search your library for a Forest card and a Plains card, put them onto the battlefield tapped, then shuffle.

{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.)

{T}: Add {C}. {G}{U}, {T}: Put a +1/+1 counter on each creature that entered the battlefield this turn.

({T}: Add {W} or {U}.) Prairie Stream enters the battlefield tapped unless you control two or more basic lands.

{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}: Add {G}.)

({T}: Add {U}.)

({T}: Add {R}.)

({T}: Add {W}.)

({T}: Add {B}.)

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.

All nonsnow creatures get -X/-X until end of turn, where X is the number of snow permanents you control.

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.

Each player chooses a creature type. Destroy all creatures that aren't of a type chosen this way. They can't be regenerated.

Hurricane deals X damage to each creature with flying and each player.

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

Create an X/X green Ooze creature token, where X is the greatest power among creatures you control.