Moritte of the Frost

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.

Unifying Theory

Whenever a player casts a spell, that player may pay {2}. If the player does, they draw a card.

Temple Bell

Dictate of Kruphix

Flash
At the beginning of each player's draw step, that player draws an additional card.

Vernal Equinox

Any player may cast creature and enchantment spells as though they had flash.

Well of Knowledge

{2}: Draw a card. Any player may activate this ability but only during their draw step.

Snow-Covered Swamp

Otherworld Atlas

{T}: Put a charge counter on Otherworld Atlas.
{T}: Each player draws a card for each charge counter on Otherworld Atlas.

Spectral Searchlight

{T}: Choose a player. That player adds one mana of any color they choose.

Rites of Flourishing

At the beginning of each player's draw step, that player draws an additional card.
Each player may play an additional land on each of their turns.

Tempting Wurm

When Tempting Wurm enters the battlefield, each opponent may put any number of artifact, creature, enchantment, and/or land cards from their hand onto the battlefield.

Fecundity

Whenever a creature dies, that creature's controller may draw a card.

Font of Mythos

At the beginning of each player's draw step, that player draws two additional cards.

Upwelling

Players don't lose unspent mana as steps and phases end.

Gate to the Aether

At the beginning of each player's upkeep, that player reveals the top card of their library. If it's an artifact, creature, enchantment, or land card, the player may put it onto the battlefield.

Heartbeat of Spring

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Torment of Hailfire

Repeat the following process X times. Each opponent loses 3 life unless that player sacrifices a nonland permanent or discards a card.

Helm of Awakening

Horn of Plenty

Whenever a player casts a spell, they may pay {1}. If the player does, they draw a card at the beginning of the next end step.

Enslaved Horror

When Enslaved Horror enters the battlefield, each other player may return a creature card from their graveyard to the battlefield.

Kaldring, the Rimestaff

{T}: You may play target snow permanent card from your graveyard this turn. If you do, it enters the battlefield tapped.

Jorn, God of Winter

Whenever Jorn attacks, untap each snow permanent you control.

Jorn, God of Winter // Kaldring, the Rimestaff

Kami of the Crescent Moon

At the beginning of each player's draw step, that player draws an additional card.

Well of Ideas

When Well of Ideas enters the battlefield, draw two cards.
At the beginning of each other player's draw step, that player draws an additional card.
At the beginning of your draw step, draw two additional cards.

Horn of Greed

Whenever a player plays a land, that player draws a card.

Dictate of Karametra

Flash
Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Heartwood Storyteller

Whenever a player casts a noncreature spell, each of that player's opponents may draw a card.

Snow-Covered Island

Borderland Explorer

When Borderland Explorer enters the battlefield, each player may discard a card. Each player who discarded a card this way may search their library for a basic land card, reveal it, put it into their hand, then shuffle.

Snow-Covered Forest

Ghirapur Orrery

Each player may play an additional land on each of their turns.
At the beginning of each player's upkeep, if that player has no cards in hand, that player draws three cards.