msem-instigator

Choose one. If an opponent lost 3 or more life this turn, choose any number instead.
• Target player sacrifices a legendary creature.
• Target player reveals their hand. You choose a nonland card from it. That player discards that card.
• Exile target player's graveyard.

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 Karoa, His Roaring Grace deals combat damage to a player, if he's not equipped, create a colorless Equipment artifact token named Banner attached to him. The token has equip {1} and “Equipped creature gets +1/+1.”

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

Add two mana in any combination of colors. (Then exile this card. You may cast the creature later from exile.)

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.

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.

Flash
When Leafdown Ambusher enters, create three colorless artifact tokens named Arrow. They have “{T}, Tap an untapped creature you control, Sacrifice this permanent: The tapped creature fights target creature you don't control. Activate only as a sorcery unless this permanent entered this turn.”

Whenever equipped creature attacks, put a +1/+1 counter on it.
Equip {2}

Lifelink
Menagerie — When Leafdown Glimmerfox enters, if there are five or more creature types among creatures you control, exile another target nonland permanent until its controller's next end step.

Trample
Leafdown Hunk enters with two +1/+1 counters on it if you control another creature with power 4 or greater.

When Leafdown Lookout enters, if you control another Scout, draw a card, then you may put a land card from your hand onto the battlefield tapped.

Whenever you cast an instant, sorcery, or Wizard spell, Leafdown Sizzlemage gets +1/+0 until end of turn.

Exile all creatures, then for each creature exiled this way, you may return it to the battlefield under its owner's control. For each creature you didn't return to the battlefield this way, its owner may search their library for a basic land card and put it onto the battlefield tapped. Each player that does shuffles.

Enchant creature
As Legacy of Dawn Hill enters, choose a creature type.
Enchanted creature gets +2/+0, has first strike, and is the chosen type in addition to its other types.

Enchant creature
As Legacy of Frondpond enters, choose a creature type.
Enchanted creature gets +2/+1, has deathtouch, and is the chosen type in addition to its other types.

Enchant creature
As Legacy of Highpoint enters, choose a creature type.
Enchanted creature gets +2/+2, has flying, and is the chosen type in addition to its other types.

Flash
Enchant creature
As Legacy of Northrime enters, choose a creature type.
Enchanted creature gets +1/+4 and is the chosen type in addition to its other types.

Enchant creature
As Legacy of Siltbottom enters, choose a creature type.
Enchanted creature gets +3/+3 and is the chosen type in addition to its other types.

When Leyline Invoker enters and at the beginning of your upkeep, you may mill two cards.
{5}{B}, {T}, Sacrifice Leyline Invoker: Return target creature card from your graveyard to the battlefield. This ability costs {1} less to activate for each creature card in your graveyard.

This spell costs {2} less to cast if you've cast another spell this turn.
Draw two cards, then put a card from your hand on top of your library.

Haste
You may cast sorcery and enchantment spells as though they had flash.
Whenever you cast an enchantment, instant, or sorcery spell, Lightning-Fast Lionfish gets +1/+0 and gains first strike until end of turn.

When Lilyreed Triton enters, create a white Aura enchantment token named Triton's Gift attached to target creature. The token has enchant creature and “Enchanted creature gets +1/+0 and can't be blocked by creatures with power 3 or greater.”