msem-instigator

Enchant opponent
Whenever Middleware or another Curse becomes attached to enchanted player, exile the top card of that player's library face down. For as long as that card remains exiled, you may look at it and you may play it. Mana of any type can be spent to cast that spell.

Target opponent reveals their hand, exiles each nonland card from it, then conjures a card named Data-Point into their hand for each card exiled this way. (It's a sorcery that costs {2} with “Draw a card.”)

When Limited Mortality enters, return up to one target creature card from your graveyard to your hand.
{1}{B}, Sacrifice Limited Mortality: Return target creature card from your graveyard to your hand. Activate only as a sorcery.

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
Once during each of your turns, you may cast a spell with mana value 3 or less that targets a cursed opponent or a permanent a cursed opponent controls by paying life equal to its mana value rather than its mana cost.

Enchant opponent
Whenever enchanted player is attacked, up to one target attacking creature gains menace and lifelink until end of turn.

This spell costs {1} less to cast and can't be countered if it targets a cursed opponent.
Target opponent mills eight cards. Exile up to two nonland cards milled this way. Until the end of your next turn, you may cast those cards and mana of any type can be spent to cast those spells.

When Honey Pot enters, create two 1/1 black Demon enchantment creature tokens with breach and “This creature can't block.” (Whenever it deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
Whenever a Curse you control becomes attached to an opponent, that player loses 1 life and you gain 1 life.

Once during each of your turns, when you sacrifice a permanent, you may have target opponent lose 3 life unless they sacrifice a nonland permanent or discard a card.

This spell costs {X} less to cast, where X is the number of card types among cards in your graveyard.
Surveil 3, then you draw three cards. You lose 3 life.

Target player draws X cards and loses X life, where X is the number of enchantments you control.

{3}, {T}: Each opponent loses 2 life. This ability costs {3} less to activate if you've sacrificed a permanent this turn.

When CySec Spectre enters, you may sacrifice a creature. If you do, target opponent loses 3 life and you gain 3 life.

CySec Infiltrator can't be blocked except by enchantment creatures.
Whenever CySec Infiltrator attacks, create a Function token with “Target player loses 2 life and you gain 2 life.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Menace
Whenever CySec Blacksuit deals combat damage to a player or planeswalker, create a Function token with “Choose a nonland card exiled by this spell. For as long as that card is exiled, you may cast it and you mana of any type can be spent to cast that spell.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Sacrifice a creature: Each opponent loses 1 life and you gain 1 life.
Sacrifice two creatures: Draw a card.
Sacrifice three creatures: Exile target creature or planeswalker.

When Corrupt Warden enters, up to one target creature gets -X/-X until end of turn, where X is the number of card types among cards in your graveyard.

Consume Creation deals 2 damage to any target and you gain 2 life.

Flying
Whenever you gain life, each opponent loses 1 life.

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
At the beginning of your end step, each cursed opponent loses 2 life unless they discard a card.

Lifelink
{T}, Pay 4 life or sacrifice another permanent: Draw a card.

When Blacksite Moderator enters, you may pay 2 life or sacrifice a permanent. If you do, draw a card.

Menace
Once during each of your turns, when you sacrifice a permanent, you may put a +1/+1 counter on Assimilated Runner.

Defender
When Virtual Access Point enters, create a Function token with “Target player mills four cards.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Conjure six duplicates of target instant or sorcery card in a graveyard into your main library. Then shuffle.
Draw a card.

Flash
When Threadripper Savant enters, put a stun counter on up to one target creature.