msem-instigator

Codex — Majestic Dominion; Pristine Dominion; Verdant Dominion; Stalwart Dominion; Primal Dominion; Rugged Dominion; Into the Woods. (As this enters, conjure its contents into a shuffled face-up additional library.)
Before you explore this library, you may put a card from the codex's library on top of it.
{3}{G}: Target creature you control explores.

Exile all creatures with power 4 or greater.

Up to two target lands you control become 1/1 black Bear creatures with deathtouch. They're still lands. (Then exile this card. You may cast the creature later from exile.)

If a source you control would deal noncombat damage, it deals double that damage instead.

When Gallipot Apothecary enters, create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Flying
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Garden Cherub's power and toughness are each equal to the number of creatures you control.
Garden Cherub can't be blocked by creatures with power 2 or less.

When Garish Gillian enters, tap target land an opponent controls. That land doesn't untap during its controller's next untap step.
Unveil {3}{U}{R} ({3}{U}{R}: Transform this. Unveil only as a sorcery.)

Vigilance
Death knell — Tap up to two creatures you don't control. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)

Choose flying, prowess, vigilance, or ward {2}. Create a colorless Equipment artifact token with “Equipped creature has the chosen ability” and equip {2}. (Then exile this card. You may cast the creature later from exile.)

When Gemcrusher Turtle enters, choose one —
• Destroy target artifact.
• Gemcrusher Turtle fights up to one target creature.

Target permanent phases out. (Then exile this card. You may cast the artifact later from exile.)

Creatures can't attack you or a planeswalker you control unless their controller pays {2} for each of those creatures.
Creatures can't block Ghastly Scraper unless their controller pays {2} for each of those creatures.

Flash

Until end of turn, target creature you control gains “When this creature dies, return it to the battlefield under your control with a +1/+1 counter on it.”

Trample

{T}, Discard a card: Draw a card.
Unveil {2}{U}{R} ({2}{U}{R}: Transform this. Unveil only as a sorcery.)

When Gleaming Waypoint enters, create a 1/1 red Scout creature token.
{T}: Add {U}, {R}, or {W}.

Prowess
Wither (This deals damage to creatures in the form of -1/-1 counters.)

Wither (This deals damage to creatures in the form of -1/-1 counters.)
Instant and sorcery spells you control have wither. (They deal damage to creatures in the form of -1/-1 counters.)

{3}, {T}: Glimmering Staff deals 1 damage to any target.
{5}, {T}: Put a -1/-1 counter on target creature.

When Gloomy Waypoint enters, create a 1/1 black Scout creature token.
{T}: Add {W}, {B}, or {G}.

Flying
{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only any time you could cast a sorcery.

Enchant player
At the beginning of enchanted player's end step, if they cast a spell this turn, they lose 1 life.