msem-instigator

When Keeper of Blue Incense enters, submerge target card from your graveyard. (To submerge a card, exile it, then put it on the battlefield face down under its owner's control as a 2/2 creature.)

When Keeper of Pearls enters or a creature scavenges it, you gain 2 life.
Scavenge {G} ({G}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

Whenever one or more other creatures you control die, put a +1/+1 counter on Keeper of Tradition.

This spell costs {1} less to cast for each permanent you control that's an artifact and/or a token.
When Kellythross's Collector enters, you may return another target nonland permanent to its owner's hand.

Sacrifice Kemono-no-Oni: Return target creature card from your graveyard to your hand.

Spirited (When this creature enters, you may activate one of its activated abilities without paying its cost.)
{2}{R}, {T}: Target creature can't block this turn.

Enchant opponent
Creatures attacking enchanted player get +2/+0.
{R}, Discard Kernel Flare: Draw a card.

You gain 3 life.
Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

Enchant opponent
Whenever enchanted player is attacked, up to one target attacking creature gains menace and lifelink until end of turn.

Target creature gets +1/+3 until end of turn.

Destroy target attacking creature.

When Kill This Love enters, target opponent sacrifices a creature.
At the beginning of each end step, if a creature died this turn, you gain 2 life.

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

When Killdrone Engineer enters, create a 1/1 colorless Servo artifact creature token.
Artifacts you control have deathtouch.

Choose one —
• Kilnfire deals 1 damage to each creature and planeswalker target player controls.
• Destroy target artifact.

When Kin of the Rainforest enters, you may put a land card from your hand onto the battlefield.
Ascend {1}{R} ({1}{R}: Exile this creature, then return it to the battlefield transformed. Ascend only as a sorcery.)

As an additional cost to cast this spell, sacrifice a creature.
Kindle the Cursed deals 3 damage to target creature and 3 damage to that creature's controller.

Revive {3}{B} ({3}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Flying
When Kinjiru Sandshaper enters, tap target creature.

When Kinsang Butcher enters, create a Treasure token.
{1}, Sacrifice an artifact or another creature: Put a +1/+1 counter on Kinsang Butcher. Activate only as a sorcery.

Kinsang Shrine enters tapped.
{T}: Add {B} or {G}.
{B/G}, {T}, Sacrifice Kinsang Shrine: Put a +1/+1 counter on target creature you control. Activate only as a sorcery.

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
Whenever Knight of the Cockatrice attacks, you may pay {1}{R}. When you do, target creature can't block this turn.

Knight of the Olive Orchard can't be blocked by more than one creature.

Tap another untapped creature you control: Knight of the Orchards gets +1/+1 until end of turn.

When Knight's Attendant enters, create a 2/2 white Knight creature token with vigilance.