Swiftwater Cliffs

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {U} or {R}.

Poised Practitioner

Flurry — Whenever you cast your second spell each turn, put a +1/+1 counter on this creature. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Riverwheel Sweep

Tap target creature. Put three stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Exile the top two cards of your library. Choose one of them. Until the end of your next turn, you may play that card.

Snowmelt Stag

Vigilance
During your turn, this creature has base power and toughness 5/2.
{5}{U}{U}: This creature can't be blocked this turn.

Embermouth Sentinel

When this creature enters, you may search your library for a basic land card, reveal it, then shuffle and put that card on top. If you control a Dragon, put that card onto the battlefield tapped instead.

Dispelling Exhale

As an additional cost to cast this spell, you may behold a Dragon. (You may choose a Dragon you control or reveal a Dragon card from your hand.)
Counter target spell unless its controller pays {2}. If a Dragon was beheld, counter that spell unless its controller pays {4} instead.

Plains

Fresh Start

Flash
Enchant creature
Enchanted creature gets -5/-0 and loses all abilities.

Boulderborn Dragon

Flying, vigilance
Whenever this creature attacks, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Wind-Scarred Crag

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {R} or {W}.

Iceridge Serpent

When this creature enters, return target creature an opponent controls to its owner's hand.

Dragonstorm Globe

Each Dragon you control enters with an additional +1/+1 counter on it.
{T}: Add one mana of any color.

Jeskai Shrinekeeper

Flying, haste
Whenever this creature deals combat damage to a player, you gain 1 life and draw a card.

Auspicious Arrival

Target creature gets +2/+2 until end of turn. Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Chilling Screech

Counter target spell with mana value 2 or less. (Then shuffle this card into its owner's library.)

Runescale Stormbrood

Flying
Whenever you cast a noncreature spell or a Dragon spell, this creature gets +2/+0 until end of turn.

Runescale Stormbrood // Chilling Screech

Flush Out

Discard a card. If you do, draw two cards. (Then shuffle this card into its owner's library.)

Stormshriek Feral

Flying, haste
{1}{R}: This creature gets +1/+0 until end of turn.

Stormshriek Feral // Flush Out

Radiant Strike

Destroy target artifact or tapped creature. You gain 3 life.

Island

Narset's Rebuke

Narset's Rebuke deals 5 damage to target creature. Add {U}{R}{W}. If that creature would die this turn, exile it instead.

Jeskai Monument

When this artifact enters, search your library for a basic Island, Mountain, or Plains card, reveal it, put it into your hand, then shuffle.
{1}{U}{R}{W}, {T}, Sacrifice this artifact: Create two 1/1 white Bird creature tokens with flying. Activate only as a sorcery.

Frostcliff Siege

As this enchantment enters, choose Jeskai or Temur.
• Jeskai — Whenever one or more creatures you control deal combat damage to a player, draw a card.
• Temur — Creatures you control get +1/+0 and have trample and haste.

Cori Mountain Stalwart

Flurry — Whenever you cast your second spell each turn, this creature deals 2 damage to each opponent and you gain 2 life.

Unending Whisper

Draw a card.
Harmonize {5}{U} (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by {X}, where X is its power. Then exile this spell.)

Devoted Duelist

Haste
Flurry — Whenever you cast your second spell each turn, this creature deals 1 damage to each opponent.

Mystic Monastery

This land enters tapped.
{T}: Add {U}, {R}, or {W}.

Divert Disaster

Counter target spell unless its controller pays {2}. If they do, you create a Lander token. (It's an artifact with "{2}, {T}, Sacrifice this token: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.")

Teeming Dragonstorm

When this enchantment enters, create two 2/2 white Soldier creature tokens.
When a Dragon you control enters, return this enchantment to its owner's hand.

Osseous Exhale

As an additional cost to cast this spell, you may behold a Dragon. (You may choose a Dragon you control or reveal a Dragon card from your hand.)
Osseous Exhale deals 5 damage to target attacking or blocking creature. If a Dragon was beheld, you gain 2 life.

Ringing Strike Mastery

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Enchanted creature has "{5}: Untap this creature."

Signaling Roar

Create a 2/2 white Soldier creature token. (Then shuffle this card into its owner's library.)

Riling Dawnbreaker

Flying, vigilance
At the beginning of combat on your turn, another target creature you control gets +1/+0 until end of turn.

Riling Dawnbreaker // Signaling Roar

Static Snare

Flash
This spell costs {1} less to cast for each attacking creature.
When this enchantment enters, exile target artifact or creature an opponent controls until this enchantment leaves the battlefield.

Mountain

Molten Exhale

You may cast this spell as though it had flash if you behold a Dragon as an additional cost to cast it. (To behold a Dragon, choose a Dragon you control or reveal a Dragon card from your hand.)
Molten Exhale deals 4 damage to target creature or planeswalker.

Evolving Wilds

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