This spell costs less to cast for each card you've drawn this turn.
Inspired Fire deals 4 damage to target creature.

Exile two target artifacts.

Target creature attacks this turn if able.
Splice onto Arcane

Invasive Maneuvers deals 3 damage to target creature. It deals 5 damage instead if you control a Spacecraft.

Choose one —
• Target creature gets +4/+0 and gains trample until end of turn.
• Two target creatures each get +2/+0 and gain trample until end of turn.

You may cast up to two instant and/or sorcery spells with total mana value 6 or less from your graveyard and/or hand without paying their mana costs. If those spells would be put into your graveyard, exile them instead. Exile Invoke Calamity.

Ire of Kaminari deals damage to any target equal to the number of Arcane cards in your graveyard.

Jaya's Greeting deals 3 damage to target creature. Scry 1.

Sneak
Jennika's Technique deals 2 damage to each creature.

Judgment Bolt deals 5 damage to target creature and X damage to that creature's controller, where X is the number of Equipment you control.

Just Desserts deals damage to target creature. ( is the ratio of a circle's circumference to its diameter. (It's a smidgen more than 3.))

Kami's Flare deals 3 damage to target creature or planeswalker. Kami's Flare also deals 2 damage to that permanent's controller if you control a modified creature. (Equipment, Auras you control, and counters are modifications.)

As an additional cost to cast this spell, sacrifice a creature.
Kazuul's Fury deals damage equal to the sacrificed creature's power to any target.

Kindle deals X damage to any target, where X is 2 plus the number of cards named Kindle in all graveyards.

Target creature gets +1/+0 and gains first strike until end of turn.

Target creature gets +1/+0 and gains first strike until end of turn. Scry 1.

Devoid
Kozilek's Return deals 2 damage to each creature.
Whenever you cast an Eldrazi creature spell with mana value 7 or greater, you may exile this card from your graveyard. If you do, this card deals 5 damage to each creature.

Lash Out deals 3 damage to target creature. Clash with an opponent. If you win, Lash Out deals 3 damage to that creature's controller. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

Sacrifice any number of creatures. Last-Ditch Effort deals that much damage to any target.

As an additional cost to cast this spell, discard a card.
Draw two cards.
Flashback

Lava Dart deals 1 damage to any target.
Flashback — Sacrifice a Mountain.

Lava Storm deals 2 damage to each attacking creature or Lava Storm deals 2 damage to each blocking creature.

If an opponent had two or more lands enter the battlefield under their control this turn, you may pay rather than pay this spell's mana cost.
Destroy two target lands. Lavaball Trap deals 4 damage to each creature.

Light of Judgment deals 6 damage to target creature. Destroy up to one Equipment attached to that creature.

As an additional cost to cast this spell, discard a card or pay .
Lightning Axe deals 5 damage to target creature.

Lightning Blast deals 4 damage to any target.

Lightning Bolt deals 3 damage to any target.

Lightning Dart deals 1 damage to target creature. If that creature is white or blue, Lightning Dart deals 4 damage to it instead.

Lightning Storm deals X damage to any target, where X is 3 plus the number of charge counters on Lightning Storm.
Discard a land card: Put two charge counters on Lightning Storm. You may choose a new target for it. Any player may activate this ability but only if Lightning Storm is on the stack.

Lightning Strike deals 3 damage to any target.