Sulfur Falls

This land enters tapped unless you control an Island or a Mountain.
{T}: Add {U} or {R}.

Dragon's Claw

Whenever a player casts a red spell, you may gain 1 life.

Anger of the Gods

Anger of the Gods deals 3 damage to each creature. If a creature dealt damage this way would die this turn, exile it instead.

Mana Leak

Counter target spell unless its controller pays {3}.

Dispel

Mountain

Smelt

Frost Titan

Whenever this creature becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {2}.
Whenever this creature enters or attacks, tap target permanent. It doesn't untap during its controller's next untap step.

Tormod's Crypt

{T}, Sacrifice this artifact: Exile target player's graveyard.

Annex

Enchant land (Target a land as you cast this. This card enters attached to that land.)
You control enchanted land.

Dream Leash

Enchant permanent
You can't choose an untapped permanent as this spell's target as you cast it.
You control enchanted permanent.

Mikokoro, Center of the Sea

{T}: Add {C}.
{2}, {T}: Each player draws a card.

Wildfire

Each player sacrifices four lands of their choice. Wildfire deals 4 damage to each creature.

Serum Visions

Repeal

Return target nonland permanent with mana value X to its owner's hand.
Draw a card.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Negate

Island

Mind Stone

{T}: Add {C}.
{1}, {T}, Sacrifice this artifact: Draw a card.

Izzet Signet

Roast

Roast deals 5 damage to target creature without flying.