msem-instigator

Double your life total. (Then exile this card. You may cast the creature later from exile.)

Bristling Skoki has first strike as long as it's attacking.
Whenever Bristling Skoki blocks a creature, you may have it deal damage equal to its toughness to that creature.

{W}, {T}: Target attacking creature gets +1/+1 until end of turn. This ability costs {W} less to activate if it targets a Soldier.

Put a +1/+1 counter on each creature you control. (Then exile this card. You may cast the creature later from exile.)

Whenever Dawn Hill Daybreaker or another creature enters the battlefield under your control, you gain 1 life. If that creature is a Cleric, tap up to one target creature an opponent controls.

Double strike

Search your library for an Equipment card, reveal it, put it into your hand, then shuffle. (Then exile this card. You may cast the creature later from exile.)

Vigilance
This spell costs {1} less to cast for each +1/+1 counter among creatures you control.

Put a +1/+1 counter on each creature you control that entered the battlefield this turn. (Then exile this card. You may cast the creature later from exile.)

Untapped creatures you control get +1/+1.
Soldiers you control have vigilance.

Lifelink
Frostguard Sentry has flying as long as it has a +1/+1 counter on it.

Flying
Whenever you cast a creature spell, creatures you control get +1/+1 until end of turn.
Whenever you cast a noncreature spell, create a 2/2 red and white Cat Knight creature token.

When Happily Retired enters the battlefield, exile target creature you don't control with mana value 3 or less until Happily Retired leaves the battlefield.
{1}, Sacrifice Happily Retired: Return target exiled creature card you own that's on an Adventure to your hand. Activate only as a sorcery.

Flying, lifelink

Target creature you control gains protection from the color of your choice until end of turn. (Then exile this card. You may cast the creature later from exile.)

This spell costs {1} less to cast for each +1/+1 counter among creatures you control.
Hoof Cliff Heartminer enters the battlefield with four +1/+1 counters on it.
Whenever Hoof Cliff Heartminer or another creature you control leaves the battlefield, you may put its +1/+1 counters on another target creature you control.

Vigilance
Menagerie — When Hoof Cliff Trihorn enters the battlefield, if there are five or more creature types among creatures you control, you may search your library for a card named Hoof Cliff Trihorn, reveal it, put it into your hand, then shuffle.

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

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

Whenever you cast a spell, if it isn't your main phase, choose one. This ability triggers only once each turn.
• Put a +1/+1 counter on Master of Three Paths.
• Tap target creature.
• Master of Three Paths phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

Vigilance
Whenever Mikkino becomes blocked by a creature with power 3 or greater, exile that creature.

Exile target creature. (Then exile this card. You may cast the creature later from exile.)

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you cast a legendary spell, add a quest counter.
1 — Look at the top seven cards of your library. You may reveal up to two legendary cards from among them and put them into your hand. Put the rest on the bottom of your library in a random order.
2 — You gain 5 life.
3 — Destroy all nonlegendary creatures.