Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Fervor

Creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Maraxus of Keld

Maraxus of Keld's power and toughness are each equal to the number of untapped artifacts, creatures, and lands you control.

Fanning the Flames

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.)
Fanning the Flames deals X damage to any target.

Shadowstorm

Shadowstorm deals 2 damage to each creature with shadow.

Thunderbolt

Choose one —
• Thunderbolt deals 3 damage to target player or planeswalker.
• Thunderbolt deals 4 damage to target creature with flying.

Goblin Balloon Brigade

{R}: Goblin Balloon Brigade gains flying until end of turn.

Havoc

Whenever an opponent casts a white spell, they lose 2 life.

Thundermare

Haste (This creature can attack and {T} as soon as it comes under your control.)
When Thundermare enters, tap all other creatures.

Inferno

Inferno deals 6 damage to each creature and each player.

Shard Phoenix

Flying (This creature can't be blocked except by creatures with flying or reach.)
Sacrifice Shard Phoenix: It deals 2 damage to each creature without flying.
{R}{R}{R}: Return Shard Phoenix from your graveyard to your hand. Activate only during your upkeep.

Urza's Mine

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

Flame Wave

Flame Wave deals 4 damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.

Builder's Bane

Destroy X target artifacts. Builder's Bane deals damage to each player equal to the number of artifacts they controlled that were put into a graveyard this way.

Scalding Salamander

Whenever Scalding Salamander attacks, you may have it deal 1 damage to each creature without flying defending player controls.

Jinxed Ring

Whenever a nontoken permanent is put into your graveyard from the battlefield, Jinxed Ring deals 1 damage to you.
Sacrifice a creature: Target opponent gains control of Jinxed Ring. (This effect lasts indefinitely.)

Duct Crawler

{1}{R}: Target creature can't block Duct Crawler this turn.

Urza's Tower

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

Lava Axe

Lava Axe deals 5 damage to target player or planeswalker.

Bogardan Firefiend

When Bogardan Firefiend dies, it deals 2 damage to target creature.

Lightning Elemental

Haste (This creature can attack and {T} as soon as it comes under your control.)

Magma Mine

{4}: Put a pressure counter on Magma Mine.
{T}, Sacrifice Magma Mine: It deals damage equal to the number of pressure counters on it to any target.

Earthquake

Earthquake deals X damage to each creature without flying and each player.

Mountain

Incinerate

Incinerate deals 3 damage to any target. A creature dealt damage this way can't be regenerated this turn.

Cone of Flame

Cone of Flame deals 1 damage to any target, 2 damage to another target, and 3 damage to a third target.

Chaos Charm

Choose one —
• Destroy target Wall.
• Chaos Charm deals 1 damage to target creature.
• Target creature gains haste until end of turn.

Panic

Cast this spell only during combat before blockers are declared.
Target creature can't block this turn.
Draw a card at the beginning of the next turn's upkeep.

Urza's Power Plant

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.