msem-instigator

Destroy target creature. If you do, you may put a +1/+1 counter on a creature you control.

Deception {1}{B} ({1}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever King Florence of Caulder enters or attacks, torment each opponent. (They lose 3 life unless they discard a card or sacrifice a nonland permanent.)

When King of Bones enters, exile up to ten target creature cards in graveyards. Each opponent loses X life and you gain X life, where X is the number of cards exiled this way.

Spirited (When this creature enters, you may activate one of its activated abilities without paying its cost.)
{3}{B}{B}: Choose any number of other nontoken creatures you control. Whenever one of those creatures dies this turn, create a token that's a copy of that creature, except it has no mana cost.

Lifelink
Whenever a creature with power less than Kiri, Cloudwalker's power you control enters, you may pay {W}. If you do, you gain 2 life and draw a card.

Whenever you cast a spell that targets one or more permanents you don't control, gain control of those permanents until end of turn. Untap them. They gain haste until end of turn.

This spell costs {1} less to cast for each embattled creature you control. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)
Haste
Whenever Knights of the Burning Pyre attacks, it deals X damage to each opponent, where X is the number of embattled creatures you control.

Whenever Knotweald Ambassador becomes the target of a spell or ability an opponent controls, choose one —
• Knotweald Ambassador deals damage equal to its power to target creature or planeswalker that player controls.
• Draw a card.

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
At the beginning of combat on your turn, Knotwood Lumberer gains your choice of vigilance or trample until end of turn.

Creatures you control get +1/+0 for each color among permanents you control and have haste.
Whenever you cast a white, blue, black, or green instant or sorcery spell, copy it for each of its colors. You may choose new targets for the copies.

Trample
Whenever Komurk Harvester or another creature you control dies, draw cards equal to that creature's power.

Creatures you control have protection from legendary. (Those creatures can't be blocked, targeted, dealt damage, or enchanted by anything legendary.)

Flying
Whenever you cast a spell, exile the top card of your library.
At the beginning of your end step, put a card exiled with Korephyr, Riddle Sage into its owner's hand. Put each other card exiled with Korephyr on the bottom of its owner's library in a random order.
{3}{U/B}: Scry 2.

[+1]: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.
[–2]: Koth, One True Hero deals damage to target creature equal to the number of Mountains you control.
[–7]: Create X 3/1 red Elemental creature tokens with trample and haste, where X is the number of Mountains you control.

Other creatures you control get +1/+1.
When Kotis, Promised General dies, you may return it to its owner's hand.

Haste
When Kragnoss, Rebellion Commander enters, create a 1/1 red Goblin creature token.
Whenever a Goblin you control attacks, Kragnoss, Rebellion Commander deals 1 damage to target creature defending player controls.

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.

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.)

{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.

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.

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.

Whenever an opponent casts a noncreature spell, put a +1/+1 counter on target creature you control.

Vigilance
Whenever you cast a creature or planeswalker spell, draw a card.
Lands you control have “{T}: Add {C}{C}.”

At the beginning of combat on your turn, you may have Kym, New Hope become a 4/2 Warrior creature with first strike and haste until end of turn. (They don't lose loyalty while not a planeswalker.)
[+1]: Create a red enchantment token named Blitz with “Whenever you attack, target attacking creature gets +1/+0 until end of turn.”
[–2]: Whenever you attack with one or more creatures this turn, Kym, New Hope deals that much damage to any target.