msem-instigator

When 1-ST Thankless Companion enters the battlefield, draw a card.

When 11-A Lionheart enters the battlefield, it deals 2 damage to each nonartifact creature.

Whenever you foretell a card or cast a foretold spell, you draw a card and lose 2 life.

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

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
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.

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

Each other Okus planeswalker you control enters the battlefield 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.

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

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack, add a quest counter.
1, 2 — Mill a card, then create a 1/1 black Peasant creature token.
3 — Each player sacrifices a creature.
Monument {2}{B}{B} (You may cast this transformed from your graveyard for its monument cost. Exile it if it would leave the battlefield or not resolve.)

Play with the top card of your library revealed.
You may cast creature spells from the top of your library.
You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for creature spells you cast.

When AOSE Extractor enters the battlefield, crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Vigilance
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)

When AOSE Lab Tech enters the battlefield, draw three cards, then discard two cards unless you discard an artifact card.

{1}{U}, Sacrifice two artifacts: Draw a card.
Whenever an artifact you control dies, put a stun counter on up to one target creature. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Flying
Whenever AOSE Skydrone deals combat damage to a player, draw a card.

Flying

At the beginning of your upkeep, you may pay 2 life. If you do, crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Whenever a creature you control dies, put a +1/+1 counter on AOSE Xenocultivator. If this is the third time this ability resolved this turn, AOSE Xenocultivator deals 3 damage to any target.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
{4}{B}{B}, {T}, Sacrifice Abalone Abomination: Create an X/X black Horror creature token, where X is the number of cards in your graveyard.

Whenever a creature enters the battlefield, return each other creature controlled by the same player to its owner's hand.

Abandoned Battlefield enters the battlefield tapped if you control another nonbasic land.
{T}: Add {U} or {B}.

Abandoned Cairn enters the battlefield tapped if you control another nonbasic land.
{T}: Add {B} or {R}.

Abandoned Chamber enters the battlefield with X story counters on it.
{3}, {T}, Remove all story counters from Abandoned Chamber and exile it: Return a card from your graveyard to your hand for each counter removed this way.

Abandoned Den enters the battlefield tapped.
{T}: Add {B}.
{B}, {T}: Target player loses 1 life. Activate only as a sorcery and only if you control a black creature.

Abandoned Forge enters the battlefield tapped if you control another nonbasic land.
{T}: Add {R} or {W}.