msem-instigator

When Karoa's Faithful enters the battlefield, 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 enters the battlefield under your control, 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.

Lifelink
Engage (This creature must be blocked each combat if able.)

Vigilance, lifelink
{1}, Discard a card: Target Soldier creature gains indestructible until end of turn.

Players can't cast spells with mana value greater than the number of dissent counters on Kazimir's Ban.
{2}: Put a dissent counter on Kazimir's Ban. Any player may activate this ability.

Exile target creature if its controller controls more lands than you.
Cycling {2} ({2}, Discard this card: Draw a card.)

Enchant artifact or creature
Enchanted permanent can't attack and its activated abilities can't be activated.

Chosen one ({W}{U}{B}{R}{G}: Transform this permanent.)
When Keeper of Holy Lands enters the battlefield, you may search your library for an enchantment card, reveal it, then shuffle and put that card on top of it.

Flying
Whenever Keeper of Twisted Light attacks, you gain 3 life.

Whenever you gain life for the first time each turn, create a 1/1 white Cleric creature token.

This spell has flash as long as you control another enchantment.
When Kernel Quarantine enters the battlefield, exile all other creatures until Kernel Quarantine leaves the battlefield.

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

Double strike
At the beginning of your upkeep, if Kiboshi is equipped, put a +1/+1 counter on it.

First strike
Whenever an opponent casts a spell, Kiboshi's Guardian gains indestructible until end of turn.

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

Destroy target attacking creature.

Whenever you sacrifice an enchantment, exile Kindly Pilgrim. If you do, create a 4/4 white Angel creature token with flying.

Flying
When Kinjiru Sandshaper enters the battlefield, tap target creature.

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

Lifelink
Whenever one or more other creatures with power 2 or less enters the battlefield under your control, you gain 1 life. If your life total is greater than your starting life total, draw a card instead. This ability triggers only once each turn.

Whenever one or more other creatures enter the battlefield under your control, upgrade each creature you control. (Give each one of the listed counters it doesn't already have. Upgrades are independent.)
• +1/+1
• Flying
• First strike
• Vigilance
• Lifelink

Whenever Knight of the Stag deals combat damage to a player, you may sacrifice it. If you do, search your library for a white legendary creature card, reveal it, put it into your hand, then shuffle.

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

Create a 2/2 white Knight creature token with vigilance, then populate. (Create a token that's a copy of a creature token you control.)

Enchant creature
When Knightly Valor enters the battlefield, create a 2/2 white Knight creature token with vigilance. (Attacking doesn't cause it to tap.)
Enchanted creature gets +2/+2 and has vigilance.