Flying

Whenever Korvold, Fae-Cursed King enters or attacks, sacrifice another permanent.

Whenever you sacrifice a permanent, put a +1/+1 counter on Korvold and draw a card.

As long as Kosei, Penitent Warlord is enchanted, equipped, and has a counter on it, Kosei has "Whenever Kosei, Penitent Warlord deals combat damage to an opponent, you draw that many cards and Kosei deals that much damage to each other opponent."

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

When Kotose, the Silent Spider enters, exile target card other than a basic land card from an opponent's graveyard. Search that player's graveyard, hand, and library for any number of cards with the same name as that card and exile them. Then that player shuffles. For as long as you control Kotose, you may play one of the exiled cards, and you may spend mana as though it were mana of any color to cast it.

( can be paid with either or 2 life.)

When you cast this spell, each opponent gets two poison counters, then each opponent with more than two cards in hand discards cards equal to the difference.

Annihinfect (Whenever this creature attacks, defending player sacrifices a permanent for each poison counter they have.)

When you cast this spell, if you have fewer than seven cards in hand, draw cards equal to the difference.

Menace

Discard a card with mana value X: Counter target spell with mana value X.

: Target creature can't block Kozilek's Pathfinder this turn. ( represents colorless mana.)

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.)

Minotaur creatures you control have haste.

Whenever a Minotaur you control attacks, it gets +2/+0 until end of turn.

Creatures with power less than the number of Islands you control can't block Kraken of the Straits.

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.

Whenever you cast an instant or sorcery spell, flip a coin. If you lose the flip, return that spell to its owner's hand. If you win the flip, copy that spell, and you may choose new targets for the copy.

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

Sacrifice an artifact: Krark-Clan Grunt gets +1/+0 and gains first strike until end of turn.

Sacrifice an artifact: Krark-Clan Shaman deals 1 damage to each creature without flying.

Undergrowth — When Kraul Foragers enters, you gain 1 life for each creature card in your graveyard.

Menace (This creature can't be blocked except by two or more creatures.)

Flying

, Discard a creature card: Return Kraul Swarm from your graveyard to your hand.

Reach

When Kraul Whipcracker enters, destroy target token an opponent controls.

Flying

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

At the beginning of your upkeep, roll a six-sided die. If you a roll a 1, sacrifice Krazy Kow and it deals 3 damage to each creature and each player.

: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

Flying, trample

When Krenko's Buzzcrusher enters, for each player, destroy up to one nonbasic land that player controls. For each land destroyed this way, its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.

Whenever another creature dies, you may put X +1/+1 counters on Kresh the Bloodbraided, where X is that creature's power.

Trample

Whenever a creature you control with power 4 or greater enters, put a +1/+1 counter on Kronch Wrangler.

At the beginning of your upkeep, put a shield counter on target creature an opponent controls.

Whenever you put one or more counters on a creature you don't control, tap that creature and goad it. It gains trample until your next turn. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Trample

Threshold — : Regenerate Krosan Avenger. Activate only if seven or more cards are in your graveyard.

At the beginning of your upkeep, sacrifice Krosan Cloudscraper unless you pay .

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

: Target black creature gets -2/-0 until end of turn.

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

When Krosan Druid enters, if it was kicked, you gain 10 life.

: Untap target land.

Threshold — : Untap up to three target lands. Activate only if seven or more cards are in your graveyard.

Provoke (Whenever this creature attacks, you may have target creature defending player controls untap and block it if able.)

Krosan Vorine can't be blocked by more than one creature.

Sacrifice Krosan Wayfarer: You may put a land card from your hand onto the battlefield.

: 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.

Flying

Krovikan Mist's power and toughness are each equal to the number of Illusions on the battlefield.

, Discard a nonblack card: Draw a card.

, Discard a black card: Draw two cards, then discard one of them.

Vigilance, menace, lifelink

Whenever Kroxa and Kunoros enters or attacks, you may exile five cards from your graveyard. When you do, return target creature card from your graveyard to the battlefield.

( can be paid with either or 2 life.)

Lifelink

For each in a cost, you may pay 2 life rather than pay that mana.

Whenever you cast a black spell, put a +1/+1 counter on K'rrik, Son of Yawgmoth.

Whenever another creature you control enters, Kruin Striker gets +1/+0 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Indestructible

As long as your devotion to green and blue is less than seven, Kruphix isn't a creature.

You have no maximum hand size.

If you would lose unspent mana, that mana becomes colorless instead.

Other creatures have base power and toughness 2/2 and are Bears in addition to their other types.

Whenever Kukemssa Pirates attacks and isn't blocked, you may gain control of target artifact defending player controls. If you do, Kukemssa Pirates assigns no combat damage this turn.

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.

, Sacrifice three artifacts: Search your library for an artifact card, put it onto the battlefield, then shuffle.

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

Kuldotha Ringleader attacks each combat if able.

: Kumano, Master Yamabushi deals 1 damage to any target.

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

Tap another untapped Merfolk you control: Kumena, Tyrant of Orazca can't be blocked this turn.

Tap three untapped Merfolk you control: Draw a card.

Tap five untapped Merfolk you control: Put a +1/+1 counter on each Merfolk you control.

Vigilance, menace, lifelink

Creature cards in graveyards can't enter the battlefield.

Players can't cast spells from graveyards.

At the beginning of each player's upkeep, that player sacrifices a creature of their choice.