msem-instigator

As Wayward Wanderers enters, you may have it become X/X with ward {X} and “Other creatures you control have base power and toughness X/X.”
{1}{G}: Return Wayward Wanderers to its owner's hand.

You may cast What Remains of Samuel Quinn from your graveyard and from the battlefield. It costs {G}{G} more to cast this way.
What Remains of Samuel Quinn enters with your choice of X counters from among +1/+1, vigilance, reach, and trample.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
You may have Witch of Shifting Waters enter as a copy of any creature on the battlefield, except it's an enchantment in addition to its other types.

Witchseeker Mob's power and toughness are each equal to twice the number of Citizens and/or Peasants you control.
When Witchseeker Mob enters, exile target nonland permanent an opponent controls with mana value less than or equal to Witchseeker Mob's power until Witchseeker Mob leaves the battlefield.

Trample
World Tender's power and toughness are each equal to twice the number of differently named lands you control.

Yi Cang, Thief of Blessings enters with a +1/+1 counter on them.
{1}: Yi Cang becomes a copy of target creature in their pack, except their name is Yi Cang, Thief of Blessings, they're legendary in addition to their other types, and they have this ability. (Two or more creatures you control with equal power are in a pack.)

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.”

Converge — Precursor Sentinel enters with a +1/+1 counter on it for each color of mana spent to cast it.
Remove a +1/+1 counter from Precursor Sentinel: It deals 1 damage to any target.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II, 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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Whenever you foretell a card or cast a foretold spell, you draw a card and you lose 2 life.

Choose any number —
• Counter target spell unless its controller pays {X}.
• Draw X cards, then discard a card.
• Create a tapped X/X blue Elemental creature token with flying.
Foretell {X}{U}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — 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.)
III — Distribute two +1/+1 counters among creatures you control.
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Whenever a nontoken creature enters under your control, create a Field land token with “{T}, Sacrifice this land: Add one mana of any color.”
Whenever a nontoken land enters under your control, create a 1/1 white Peasant creature token.

Each other Okus planeswalker you control enters with two additional loyalty counters on it.
[–2]: Create a 2/2 white Knight creature token with vigilance.

I, II, III — Target creature gets -X/-X until end of turn, where X is the number of lore counters on A Grave Sentence.
IV — Target opponent loses 1 life for each creature card in their graveyard.
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Look at the top five cards of your library. You may reveal a permanent card with mana value 3 or less from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Foretell {4}{R}{R} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Each player sacrifices four lands. A Kingdom Burns deals 4 damage to each creature and each planeswalker.

Equipped creature has vigilance. (Attacking doesn't cause that creature to tap.)
Equip {1}

If this spell targets a card that was put into a graveyard from the battlefield this turn, you may pay {W} rather that pay its mana cost, and cast it as though it had flash.
Return target creature card from your graveyard to the battlefield.

(As an Encounter enters, choose an opponent to protect it. You and others can attack it. When defense counters are removed, create a 0/0 Army token if you don't control one, then put that many +1/+1 counters on a Army you control.)
When A Matricide Most Foul enters or is defeated, each opponent exiles a permanent they control with the highest mana value among nonland permanents they control.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — You may create a token that's a copy of target Aura you control. Attach it to target permanent you control.
III — Put a +1/+1 counter on each enchanted creature you control. Those creatures gain indestructible and vigilance until end of turn.

Each other Okus planeswalker you control enters with two additional loyalty counters on it.
[–2]: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Return target spell to its owner's hand.
Draw a card.

Each other Okus planeswalker you control enters with two additional loyalty counters on it.
[–2]: Draw two cards, then discard a card.

When A Place to Protect enters, create four 1/1 white Human creature tokens.
Creatures you control get +1/+1.