msem-instigator

Pressure {1}{U} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
When Cuxuri Harbinger enters, draw a card.

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.)

Flash
When CySec Disruptor enters, if it was cast, target opponent conjures a card named Data-Point on top of their library. (It's a sorcery that costs {2} with “Draw a card.”)

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.)

When CySec Moderation Council enters, choose a nontoken enchantment you control or an enchantment card in your graveyard. Conjure a duplicate of that card into your hand.

CySec Nexus enters tapped.
{T}: Add {W} or {U}.
{W}{U}, {T}: Create a Function token with “Flash.” Activate only as a sorcery. (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Whenever you cast a spell with flash or an instant, untap CySec Operator.
{T}: Tap target creature.

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.)
Whenever a cursed opponent attacks, you may draw a card.

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

Flash

Other nontoken creatures you control have “When this creature enters, nourish 1.” (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)
Whenever Cybele, Mertle's Apprentice or another creature you control becomes tapped, you gain life equal to that creature's toughness.

{3}, {T}: Put a +1/+1 counter on target creature. This ability costs {3} less to activate if you've sacrificed a permanent this turn. Active only as a sorcery.

Whenever you put one or more -1/-1 counters on a creature, put that many charge counters on Cycle of Scars.
Remove three charge counters from Cycle of Scars: Copy target instant or sorcery spell you control. You may choose new targets for the copy.

Ward {4}
{4}{U}: Cyclesmith Oracle can't be blocked until end of turn. This ability costs {X} less to activate, where X is the number of card types among cards in your graveyard.

Enchant creature with mana value 4 or less
When Cyclic Dream enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

When Cyone, Expedition Captain enters, create a 1/1 Scout creature token that's all colors, then choose flying, first strike, or lifelink. Creature tokens you control gain the chosen ability until end of turn.
Whenever Cyone attacks, aetherize it. (To aetherize, create a token that's a copy of it, then exile that token.)

[+2]: Until end of turn, you may spend mana as though it were mana of any type.
[0]: For each color, put a +1/+1 counter on a creature you control of that color.
[–7]: For each color, search your library for up to one creature card of that color. Put those cards onto the battlefield, then shuffle.

Creature spells you cast cost {2} less to cast.
Whenever another nontoken creature you control enters, it becomes a colorless Vehicle artifact with crew 1. (Tap any number of creatures you control with total power 1 or greater: That Vehicle becomes an artifact creature until end of turn.)

Whenever three or more creatures you control attack, you may attach Cyrukan Battleaxe to target attacking creature.
Equipped creature gets +1/+0 and has double strike.
Equip {4}

Vigilance
When Cyrukan Guardians enters, recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

Equipped creature gets +2/+2 and has lifelink and vigilance.
Equip Angel {2}
Equip {5}

Equipped creatures you control get +1/+1 for each Equipment attached to them.
Whenever Cyrukan's Devoted attacks, create a Weapon token and attach it to target attacking creature you control. (It's an Equipment artifact with equip {2} and “Equipped creature gets +1/+1.”)

Flying
When Cyrukan's Messenger enters, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle.
Whenever Cyrukan's Messenger attacks, you may put an Equipment card from your hand onto the battlefield attached to Cyrukan's Messenger.

Indestructible
Whenever Cyrukan attacks, choose one —
• Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
• Create a Weapon token and attach it to target creature you control. (It's an Equipment artifact with equip {2} and “Equipped creature gets +1/+1.”)
At the beginning of each end step, if you control three or more tokens, transform Cyrukan.

Flying
Other creatures you control with flying get +1/+1.
Whenever Czeros, Sky Prowler deals combat damage to a player, you may pay {1}{W/U}. If you do, search your library for a creature card with flying, reveal it, put it into your hand, then shuffle.