Destroy target nonsnow creature.

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 exile two blue cards from your hand rather than pay this spell’s mana cost.

Gain control of target noncreature spell. You may choose new targets for it. (If that spell is an artifact, enchantment, or planeswalker, the permanent enters the battlefield under your control.)

Counter target spell.

Recover {2}{U}{U} (When a creature is put into your graveyard from the battlefield, you may pay {2}{U}{U}. If you do, return this card from your graveyard to your hand. Otherwise, exile this card.)

Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card.

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.

Destroy target Plains or Island. Cryoclasm deals 3 damage to that land’s controller.

Whenever you’re dealt damage, you may create that many 1/1 white Soldier creature tokens.

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.

Destroy target green or white creature.

{X}{X}{1}: Destroy target artifact or creature with mana value X.

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.)

{T}: Target creature gets -1/-1 until end of turn.

{4}{B}{B}, {T}, Sacrifice Disciple of Tevesh Szat: Target creature gets -6/-6 until end of turn.

Whenever Drelnoch becomes blocked, you may draw two cards.

Trample

Cumulative upkeep {R} or {G} (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.)

Earthen Goo gets +1/+1 for each age counter on it.

Feast of Flesh deals X damage to target creature and you gain X life, where X is 1 plus the number of cards named Feast of Flesh in all graveyards.

Other Soldier creatures get +1/+1 and have first strike. (They deal combat damage before creatures without first strike.)

Counter target red or green spell.

Cumulative upkeep {2} (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.)

Snow permanents don’t untap during their controllers’ untap steps.

Frost Marsh enters the battlefield tapped.

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