msem-instigator

Menace
When Zygos's Decimators enters, put a number of +1/+1 counters on it equal to your devotion to black. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)

Zygos, Underworld Scourge's power and toughness are each equal to the number of cards you own in exile and in your graveyard.
Spells you cast have “As an additional cost to cast this spell, you may exile any number of cards from your graveyard. This spell costs {1} less to cast for each card exiled this way.”

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Return up to X target creature cards with mana value 3 or less from your graveyard to the battlefield, where X is the number of lore counters on A Bond that Spans Planes.
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(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Audition for white. (Create a 1/1 Construct Actor creature token, a Scout Role giving 2/3 and vigilance, or a Cleric Role giving 2/2 and lifelink. Roles replace older ones.)
Distribute two +1/+1 counters among creatures you control.
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(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
You may create a token that's a copy of target Aura you control. Attach it to target creature you control.
Put a +1/+1 counter on each enchanted creature you control. Those creatures gain indestructible and vigilance until end of turn.
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(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Mill four cards.
Return target land card from your graveyard to the battlefield.
Return target creature or non-Saga enchantment card from your graveyard to the battlefield.
You may cast target instant or sorcery card from your graveyard without paying it mana cost

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Create a token that's a copy of target Construct you control.
III — Constructs you control get +2/+0 and gain vigilance until end of turn.
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(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Audition for blue. (Create a 1/1 Construct Actor creature token, a Wizard Role giving 2/2 and prowess, or a Warlock Role giving 2/1 and flying. Roles replace older ones.)
Whenever a creature you control deals combat damage to a player this turn, draw a card.
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Haste
Whenever Abominable Auteur attacks, you may return target creature card with mana value 3 or less from your graveyard to the battlefield. If that card's mana value was 1 or less, it enters tapped and attacking.

This spell can't be countered.
Flying
Whenever Ajax, Tyrant of the Empire enters or deals combat damage to a player, draw a card.
Whenever Ajax or another Dragon you control attacks, that Dragon deals 2 damage to any target.

Creatures you control gain vigilance until end of turn. After this main phase, there's an additional combat phase followed by an additional main phase.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Create four 1/1 colorless Construct Actor creature tokens.
II — Each player sacrifices a nontoken creature.
III — Each player loses 3 life.

Flying, lifelink
If an ability of an enchantment you control triggers, you may have that ability trigger an additional time.

[0]: Choose up to one target creature. You may put two +1/+1 counters on it, a +1/+1 counter on it and a loyalty counter on Aoia, Monarch of Beauty, or two loyalty counters on Aoia.
[–2]: Exile target creature, then return it to the battlefield. For each kind of counter on it before it left, put that many of that kind of counter on it.
[–9]: You get an emblem with “If an effect would put one or more counters on a permanent you control, it puts five times that many of those counters on that permanent instead.”
Aoia can be your commander.

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

Whenever Apprehensive ‘Slinger deals combat damage to a player or planeswalker, you may discard a card. If you do, draw a card.

Prowess
When Arms Tinkerer enters, choose one —
• Destroy target artifact.
• Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Exile each player's graveyard. Create a token that's a copy of a creature card exiled this way.
Create a token that's a copy of an artifact or enchantment card exiled with Around the Plane in Three Days.
Create a token that's a copy of a land or planeswalker card exiled with Around the Plane in Three Days.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
You may sacrifice a permanent. When you do, As the Lanterns Float On deals 3 damage to any target.
You may sacrifice a permanent. When you do, exile the top two cards of your library. You may play them this turn.
Create a token that's a copy of target permanent card in your graveyard with mana value 4 or less. It gains haste. Sacrifice it at the beginning of the next end step.

Create three 1/1 colorless Construct Actor creature tokens.

This spell costs {1} less to cast for each legendary creature you control.
Search your library for a legendary creature card with mana value X or less, put that card onto the battlefield, then shuffle.

When Astute Sceneweaver enters, proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

{1}, Sacrifice a creature or enchantment: Exile the top card of your library. You may play that card this turn.

This spell can't be countered.
Flying
When Aunor, Dragonsire or another Dragon you control enters, untap target land. That land becomes a 5/5 Dragon creature with flying and haste in addition to its other types.

This spell can't be countered.
Hexproof