msem-instigator

Flying, lifelink
When Archdemon Shilgengar enters, exile all land cards from your graveyard, exchange your graveyard and library, then shuffle your library.
You can only cast spells by paying life equal to their mana value rather than paying their mana cost.

{T}: Add {C}.
{T}, Pay 1 life: Add {W} or {B}.

When Sword of the Heavens enters, attach it to target creature you control.
Equipped creature gets +2/+2 and has flying, vigilance, and “Whenever this creature attacks, you may search your library and/or graveyard for an Aura or Equipment card, reveal it, put it into your hand, then shuffle.”
Equip {3}

When Soulcarver enters, destroy up to one target non-Demon creature. If you do, create a 2/2 black Demon creature token and draw a card.

(Activate each submodule once as a sorcery. When this enters, activate one submodule for free.)
{G}{G}{G}: Seed
Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.
{G}{G}{G}: Soil
Destroy target noncreature permanent.
{G}{G}{G}: Stem
Root Module gains “You may play an additional land on each of your turns.” and “Lands you control are every basic land type in addition to their other types.”

Manifest the bottom card of your library. That creature gains lifelink and deathtouch until end of turn. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

When Carrion Sculptor enters, create a 2/2 black Zombie creature token.
{2}{B}, Sacrifice a creature: Return target creature card from your graveyard to your hand.
{1}{B}, Exile Carrion Sculptor from your graveyard: Create a tapped 2/2 black Zombie creature token.

Indestructible
As long as your devotion to white and black is less than seven, Athreos isn't a creature.
Other creatures you control have lifelink.
Each player and cards in graveyards can't be the targets of spells or abilities your opponents control.

When Fox of the Juniper Vale enters, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Madness {1}{G} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

You may change the targets of target instant spell, sorcery spell, or activated ability.

You get a fuse counter, then Ignition Sequence deals X damage to any target, where X is 2 plus the number of fuse counters you have.

[progress 2+]
[progress 5+]
Whenever a creature enters, each opponent loses 1 life.

Whenever one or more Rogues you control attack, you may pay 1 life. If you do, draw a card.

Target player mills seven cards.
Inscribe {3}{U}{B} ({3}{U}{B}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

Enchant creature
Enchanted creature gets +2/+0 and has first strike.

When Viridian Townships enters, create two Idol tokens. (They're artifacts with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
{2}, Sacrifice an Idol: Draw a card.
{2}, Sacrifice an Idol: You gain 3 life.

Nonartifact spells cost {1} more to cast.

Whenever an attacking creature dies, you may pay {R}. If you do, create a 2/1 red Merfolk creature token.

Return target creature to its owner's hand. That player can't cast spells with the same name as that creature during their next turn.

Invocation — When you spend four or more mana to cast a spell or activate an ability during your turn, transform Corrupted Sorcerer.

Enchant creature
Enchanted creature gets -3/-3.
When enchanted creature dies, its controller may scry 1.

Exile the top five cards of your library. You may play one of them from exile this turn.

As an additional cost to cast this spell, exile X cards from your graveyard.
Create X tapped 2/2 black Zombie creature tokens.

Flying, vigilance