Mountain

Murmuring Mystic

Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying.

Gruul Turf

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {R}{G}.

Red Elemental Blast

Choose one —
• Counter target blue spell.
• Destroy target blue permanent.

Goblin Electromancer

Instant and sorcery spells you cast cost {1} less to cast.

Tangled Islet

({T}: Add {G} or {U}.)
This land enters tapped.

Eureka Moment

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

Electric Revelation

As an additional cost to cast this spell, discard a card.
Draw two cards.
Flashback {3}{R} (You may cast this card from your graveyard for its flashback cost and any additional costs. Then exile it.)

Simic Growth Chamber

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {G}{U}.

Pyroblast

Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.

Explore

You may play an additional land this turn.
Draw a card.

Snap

Return target creature to its owner's hand. Untap up to two lands.

Nature's Lore

Search your library for a Forest card, put that card onto the battlefield, then shuffle.

Seize the Spoils

As an additional cost to cast this spell, discard a card.
Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Manamorphose

Add two mana in any combination of colors.
Draw a card.

Molten Tributary

({T}: Add {U} or {R}.)
This land enters tapped.

Izzet Boilerworks

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {U}{R}.

Skred

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

Weather the Storm

You gain 3 life.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Wooded Ridgeline

({T}: Add {R} or {G}.)
This land enters tapped.

Goblin Anarchomancer

Each spell you cast that's red or green costs {1} less to cast.

Exclude

Counter target creature spell.
Draw a card.

Sprout Swarm

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.)
Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Create a 1/1 green Saproling creature token.