msem-instigator

Kahroba Pureblood has trample as long as it has a counter on it.

If a creature would die, exile it instead with an ancestry counter on it.
Kahroba gets +X/+X, where X is the total power of creature cards exiled with ancestry counters on them.
At the beginning of your upkeep, if there are four or more cards exiled with ancestry counters on them, transform Kahroba.

Flying
Whenever a creature you control dies, each opponent loses life equal to its power.

Flying
Whenever another Wizard you control enters, you draw a card and each opponent discards a card.
Revive {5}{U}{B} ({5}{U}{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
Inspired — Whenever Kaleidoscale Drake becomes untapped, scry 1.

Flying
Once during each of your turns, whenever you cast a spell from your graveyard, you may draw a card and create a tapped Treasure token.

Whenever Kalro Gritbrawler attacks, if you control a Desert or there is a Desert card in your graveyard, it gains double strike until end of turn.
Desertcycling {2} ({2}, Discard this card: Search your library for a Desert card, reveal it, and put it into your hand, then shuffle.)

Changeling (This card is every creature type.)
As Kalyn, Wildkin Envoy enters, choose up to three non-Human creature types.
Other creatures you control with one or more of the chosen types get +1/+1.
{2}, {T}: Create a 1/1 colorless Shapeshifter creature token with changeling. Activate only outside of combat.

{W/B}: Kambiro, the Untrue King gets +1/+1 until end of turn.
Whenever a storied permanent you control enters, if you cast it, return target creature card from your graveyard to your hand. If that creature's power is less than Kambiro's power, you may return it to the battlefield instead. (Enchantments and legendary permanents are storied.)

Haste, prowess
Whenever Kamito Warcaster attacks, you may pay {2}{R}. If you do, create a token that's a copy of another target creature you control and that's tapped and attacking. It's a colorless Spirit in addition to its other types. Exile that token at end of combat.

Whenever Kan'Gi, the Reverent perseveres, gain control of target creature an opponent controls with power less than or equal to Kan'Gi's power. (A creature perseveres when it survives damage.)

Rhapsody {5}{R}{W} (Pay {5}{R}{W} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
Whenever a creature you control with power 4 or greater attacks, look at the top four cards of your library. You may cast a nonland card with mana value 3 or less from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.

Deathtouch
When Kaneh Assassin enters, judge another target creature you control. (Honor it by putting a +1/+1 counter on it or condemn it by sacrificing it to draw a card.)

Deathtouch

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
When Kantra of Avarice enters, target player draws two cards and loses 2 life.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
Lifelink

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
When Kantra of Old Majik enters, you may return target card from your graveyard to your hand.

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast enchantment spells.

First strike
Revive {4}{W} ({4}{W}, 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.)

When Karoa's Faithful enters, target creature gets +X/+X until end of turn, where X is the total number of creatures you control that are Knights or have Adventures.

Vigilance
Whenever Karoa's Vanguard or another Knight you control enters, if an opponent controls more lands than you, you may search your library for a Plains card, reveal it, put it into your hand, then shuffle.

Whenever Keen Blademaster attacks, you may tap target creature.

When Keeper of Pearls enters or a creature you control 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.

First strike
Whenever Keeper of the Banner deals combat damage to a player, draw two cards, then discard two cards.