+1: Create a tapped Powerstone token. (It's an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")

−1: Pay any amount of mana. Look at that many cards from the top of your library, then put one of those cards into your hand and the rest on the bottom of your library in a random order.

−7: You get an emblem with "Tap an untapped artifact you control: This emblem deals 1 damage to any target."

Karn's Sylex enters the battlefield tapped.

Players can't pay life to cast spells or to activate abilities that aren't mana abilities.

, , Exile Karn's Sylex: Destroy each nonland permanent with mana value X or less. Activate only as a sorcery.

When Kaslem's Stonetree enters the battlefield, look at the top six cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest on the bottom in a random order.

Craft with Cave (, Exile this artifact, Exile a Cave you control or a Cave card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

This spell can't be countered.

: Kavu Chameleon becomes the color of your choice until end of turn.

Trample

Whenever Kavu Mauler attacks, it gets +1/+1 until end of turn for each other attacking Kavu.

Hexproof

+2: Each opponent loses 3 life and you gain 3 life.

0: You draw two cards. Then each opponent may scry 1.

−3: Exile target creature or enchantment. If it wasn't an Aura, create a token that's a copy of it, except it's a 1/1 white Spirit creature with flying in addition to its other types.

Level up (: Put a level counter on this. Level up only as a sorcery.)

LEVEL 2-5

1/1

: Create a 3/3 green Elephant creature token.

LEVEL 6+

1/1

: Create two 3/3 green Elephant creature tokens.

: Attach target Equipment you control to Kazuul's Toll Collector. Activate only as a sorcery.

Whenever one or more non-Human creatures you control deal combat damage to a player, draw a card.

Flying

, Tap two untapped Birds you control: Return target permanent to its owner's hand.

Enchant creature

: Regenerate enchanted creature.

: Enchanted creature gets +1/+0 until end of turn.

: Enchanted creature gains trample until end of turn.

Whenever a commander you control attacks, put a +1/+1 counter on it.

Partner (You can have two commanders if both have partner.)

Vigilance

Kemba's Legion can block an additional creature each combat for each Equipment attached to Kemba's Legion.

, Sacrifice three other artifacts and/or creatures: Look at the top three cards of your library. Put two of them into your hand and the other into your graveyard.

Partner (You can have two commanders if both have partner.)

At the beginning of your end step, you may sacrifice another creature. If you do, reveal cards from the top of your library until you reveal a nonlegendary creature card with lesser mana value, put it onto the battlefield, then put the rest on the bottom of your library in a random order.

Flying

: Killer Bees gets +1/+1 until end of turn.

At the beginning of your upkeep, reveal the top card of your library. If it's a creature card, put it onto the battlefield. That creature gains haste until end of turn. Sacrifice it at the beginning of the next end step.

: Killer Whale gains flying until end of turn.

Discard a card at random. If you do, Kindle the Carnage deals damage equal to that card's mana value to each creature. You may repeat this process any number of times.

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

Dinosaur spells you cast cost less to cast.

Kinsbaile Borderguard enters the battlefield with a +1/+1 counter on it for each other Kithkin you control.

When Kinsbaile Borderguard dies, create a 1/1 white Kithkin Soldier creature token for each counter on it.

When Kinsbaile Courier enters the battlefield, put a +1/+1 counter on target creature.

Encore (, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Flying

Whenever another nontoken creature you control dies, you may pay 2 life and exile it. If you do, create a token that's a copy of that creature, except it's 1/1 and has toxic 1. (Players dealt combat damage by it also get a poison counter.)

Kicker (You may pay an additional as you cast this spell.)

Flying

When Kitesail Cleric enters the battlefield, if it was kicked, tap up to two target creatures.

Whenever an attacking Kithkin or Elf is put into your graveyard from the battlefield, you may draw a card.

: Prevent the next 1 damage that would be dealt to any target this turn.

: Prevent all damage that would be dealt to target legendary creature this turn.

Flying, haste

Whenever Klauth, Unrivaled Ancient attacks, add X mana in any combination of colors, where X is the total power of attacking creatures. Spend this mana only to cast spells. Until end of turn, you don't lose this mana as steps and phases end.

Enchant creature

Enchanted creature gets +2/+2.

Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.)

Search target opponent's library for an instant or sorcery card. You may cast that card without paying its mana cost. Then that player shuffles.

Imprint — When Knowledge Pool enters the battlefield, each player exiles the top three cards of their library.

Whenever a player casts a spell from their hand, that player exiles it. If the player does, they may cast a spell from among other cards exiled with Knowledge Pool without paying its mana cost.

Whenever a Goblin you control is put into a graveyard from the battlefield, you may put a +1/+1 counter on Knucklebone Witch.

Menace

Equipped creature gets +2/+2 and has menace.

Whenever Komainu Battle Armor or equipped creature deals combat damage to a player, goad each creature that player controls.

Reconfigure (: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Whenever Kor Celebrant or another creature enters the battlefield under your control, you gain 1 life.

You may look at the top card of your library any time.

You may cast Dragon spells from the top of your library.

This spell costs less to cast for each card type among permanents you've sacrificed this turn.

Flying, trample, haste

Whenever Korvold deals combat damage to a player, put X +1/+1 counters on Korvold and draw X cards, where X is the number of permanent types among cards in your graveyard.

When you cast this spell, draw four cards.

Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents.)

When Kozilek, Butcher of Truth is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.

: Add .

When Kozilek's Predator enters the battlefield, create two 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this creature: Add ."

Devoid (This card has no color.)

Whenever you cast a colorless spell, Kozilek's Sentinel gets +1/+0 until end of turn.

Devoid (This card has no color.)

Pay 1 life: Add . Activate only once each turn. ( represents colorless mana.)

Creature spells you cast cost less to cast.

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Krallenhorde Howler.

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Krallenhorde Wantons.

Flying

Whenever you cast your second spell each turn, put a +1/+1 counter on Kraum, Violent Cacophony and draw a card.

: Target creature gets +1/+0 until end of turn.

: Target creature you control gains flying until end of turn. Sacrifice it at the beginning of the next end step.

Trample

Whenever Kuldotha Cackler attacks, it gets +X/+0 until end of turn, where X is the number of permanents you control with oil counters on them.

Flash

Enchant creature

If a creature dealt damage by enchanted creature this turn would die, exile it instead.

Kurbis, Harvest Celebrant enters the battlefield with a number of +1/+1 counters on it equal to the amount of mana spent to cast it.

Remove a +1/+1 counter from Kurbis: Prevent all damage that would be dealt this turn to another target creature with a +1/+1 counter on it.

: Add for each card you've drawn this turn.

Partner (You can have two commanders if both have partner.)

At the beginning of your end step, draw a card. Each player may put a land card from their hand onto the battlefield, then each opponent who didn't draws a card.