msem-instigator

Flying
Whenever an opponent discards a card, you may exile it. If you do, create a 1/1 black Bird creature token with flying and “This creature can't block.”
{B}, Sacrifice three Birds: You may cast a card exiled with Krahen, Dusk's Call without paying its mana cost.

Menace
When this creature dies, create two tapped 3/2 colorless Eldrazi creature tokens. Put a stun counter on one of them.

Whenever Krallenhorde Instigator deals combat damage to a player, create a 2/2 green Wolf creature token.
At the beginning of your end step, if Krallenhorde Instigator didn't attack this turn, transform it.

Menace
You may spend mana as though it were mana of any color to cast double-faced spells or activate abilities of double-faced sources.
Once during each of your turns, you may cast a double-faced spell you own from outside the game.

This spell can't be countered.
Whenever another nontoken creature you control dies, return it to its owner's hand at the beginning of the next end step.
{6}{G}: Transform Krendel of Kessig. Activate only if it's attacking.

Creature spells you cast can't be countered.
Whenever another nontoken creature you control dies, if it didn't have a +1/+1 counter on it, return it to the battlefield under your control with a +1/+1 counter on it.
At the beginning of your end step, if Krendel, Krallenhorde Alpha didn't attack this turn, transform it.

Bestow {1}{G}{W}{U} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Krikam, the Wanderer and enchanted creature have protection from nonenchanted creatures.

Concord — You may cast this spell as though it had flash if there are four or more card types among permanents you control.
When Krill-Clan Guardian enters, it fights up to one other target creature. If that creature would die this turn, return it to its owner's hand instead.

Once each turn, when you sacrifice a land, you may add one mana of any color. Until end of turn, you don't lose this mana as steps and phases end.

Krismite Shard enters tapped.
{1}, {T}, Sacrifice Krismite Shard: Aetherize target creature you control. (To aetherize, create a token that's a copy of it, then exile that token.)

{T}: Add {C}.
When Krismite Vault is put into a graveyard from the battlefield, create a tapped colorless artifact token named Mox Krismite with “{T}: Add one mana of any color.”

Flying
When Krothuss, Abyssal Terror dies, return all creatures to their owners' hands except for Krakens, Leviathans, Octopuses, and Serpents.
Foreshadow {6}{U}{U} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

Indestructible
As long as your devotion to green and blue is less than seven, Kruphix isn't a creature.
Spells you cast from anywhere other than your hand cost {2} less to cast.
At the beginning of your upkeep, if there are no cards exiled with Kruphix, exile the top card of your library face down. You may look at and play that card for as long as it remains exiled.

{3}{B}{B}: Return target Zombie creature card from your graveyard to the battlefield.
Whenever another creature you control enters from a graveyard or you revive a creature token, that creature gets +2/+0 and gains haste and menace until end of turn.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
When Kui Mu Lang enters, exile a card from your graveyard. When you do, Kui Mu Lang deals damage equal to that card's mana value to up to one target creature or planeswalker.
{2}{R}: Demigod — Exile your hand, then draw three cards.
{4}{R}{R}: God — Cast any number of cards exiled with Kui Mu Lang without paying their mana costs.

When Kula's Disciple dies, put it on the bottom of its owner's library.

This spell costs {1} less to cast for each creature type among creature cards in your graveyard.
Deathtouch
{1}{B}, Exile any number of creature cards from your graveyard with five or more different creature types among them: Search your library for a card, put it into your hand, then shuffle. Activate only as a sorcery.

Sacrifice Kumo-no-Oni: Prevent all combat damage that would be dealt this turn.

Whenever you cast a spell with mana value greater than the number of loyalty counters on Kunal, Dragonclaw's Legacy, put a loyalty counter on him.
[0]: Until end of turn, Kunal becomes a Monk creature with haste, indestructible, and “Kunal's base power and toughness are each equal to the number of counters on him.”
[–2]: Return target card from your graveyard to your hand.

Flash
Spirited (When this creature enters, you may activate one of its activated abilities without paying its cost.)
{1}: Remove target attacking creature you control from combat and untap it.

Art of war — At the beginning of your end step, if Kurayami Butcher dealt damage to an opponent, you may destroy target creature that was dealt damage this turn.

Whenever another nontoken creature you control dies, you may exile it. If you do, create a 2/2 colorless Spirit creature token.

Art of war — At the beginning of your end step, if Kurayami Ronin dealt damage to an opponent this turn, you draw a card and you lose 1 life.

{T}: Add {C}.
Tap an untapped creature you control: Kurayami Shrine becomes a 1/1 Spirit creature with deathtouch until end of turn. It's still a land.

Art of war — At the beginning of your end step, if Kuryu Swordsman dealt damage to an opponent this turn, you may have Kuryu Swordsman fight target creature you don't control. (Each deals damage equal to its power to the other.)