msem-instigator

Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Magnitude deals X damage to each player and each creature without flying that didn't harness it.

(Activate each submodule once as a sorcery. When this enters, activate one submodule for free.)
{R}{R}{R}: Bold
Any player may have Identity Module deal 5 damage to them. If no one does, draw three cards.
{R}{R}{R}: Brash
Identity Module deals 3 damage to any target.
{R}{R}{R}: Burning
Identity Module gains “Players can't gain life” and “At the beginning of each player's upkeep, Identity Module deals 2 damage to that player.”

Flying
Concord — When Archangel of Accord enters, if there are four or more card types among permanents you control, destroy all other creatures.

Whenever a creature an opponent controls becomes blocked, put a -1/-1 counter on that creature.

Whenever Apex of Augmentation attacks, other creatures you control can't be blocked this turn.

[+1]: Each player discards a card at random, then draws a card.
[–2]: Until end of turn, gain control of target nonland permanent and it gains haste. Untap it.
[–6]: You get an emblem with “Whenever a source you control deals damage to an opponent, gain control of target permanent that player controls.”

If a source would deal damage to you or a permanent you control this turn, prevent all but 1 of that damage.
Metamorph {1}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Whenever a creature attacks you or a planeswalker you control, upgrade Enigmatic Protector. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Prowess

Pressure {3}{B}{B} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Each player sacrifices a creature. Put a creature card from a graveyard onto the battlefield under your control.

You gain 4 life. Then if you have more life than an opponent, draw a card.

Equipped creature gets +2/+0 and is a Dragon in addition to its other types.
Equip {1}

Trample
Arpechian Champion can only attack or block alone.
Whenever a land you control enters, put a +1/+1 counter on Arpechian Champion.

Destroy target creature. End of the Road deals damage equal to that creature's power to that creature's controller or a planeswalker that player controls.

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.)

Flash
Flying, lifelink, deathtouch
When Chosen of Aminatou enters, scry 2, then draw a card.

Enchant creature
When Yenzu Puppeteering enters, draw a card.
{1}{U}: Untap enchanted creature.

Whenever one or more other creatures you control enter, 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

Mill three cards, then you may return a creature or land card from your graveyard to your hand. (To mill three cards, put the top three cards of your library into your graveyard.)

Enchant creature
Enchanted creature has winnow. (Damage dealt to it also causes its controller to lose that much life.)

Sacrifice a creature: Exile the top card of your library. Until end of turn, you may play that card.

Destroy target tapped creature. Scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Flying, lifelink
Morph {4}{B}
When Soul Cajoler is turned face up, manifest the bottom card of your library. (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.)

Destroy all creatures. If a Reflection would be destroyed this way, its owner shuffles it into their library instead.

Substack Ports enters tapped.
{T}: Add {U} or {B}.
{U}{B}, {T}, Sacrifice Substack Ports: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

Flying
Wanderlust — When Crest Skimmer enters, if you control four or more differently named lands, draw a card.