msem-instigator

Sabotage — Whenever an opponent or permanent an opponent controls becomes the target of a spell you control, put a quest counter on Beckon Darkness.
At the beginning of your upkeep, if Beckon Darkness has four or more quest counters on it, return target creature card from your graveyard to the battlefield.

Defender (This creature can't attack.)
Whenever you cast a spell, if it isn't your main phase, Serene Meditant loses defender until the beginning of your next end step.

Equipped creature gets +2/+1.
Whenever a creature you control deals combat damage to a player or planeswalker, you may attach Mervin's Armor to it.
Equip {4}

{T}: Add one mana of any color.
{X}: Terracotta Idol becomes a Spirit artifact creature with base power and toughness X/X until end of turn. Activate only as a sorcery.

[+1]: Reveal the top card of your library and put it into your hand. Then if that card wasn't legendary, discard a card.
[–X]: Return target non-Reyhsia legendary permanent card with mana value X from your graveyard to the battlefield.
[–6]: Reyhsia, the Honorless deals 4 damage to each nonlegendary creature.

Flying
Whenever you cast a spell from your graveyard, return Unliving Swarm from your graveyard to your hand.

Whenever Optimistic Chronicler deals damage to a player or noncreature permanent, surveil 1, then draw a card.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Put all creature cards from your graveyard onto the battlefield.
II — Creatures you control gain lifelink until end of turn.
III — Destroy all creatures.

Vithian Arcanist gets +2/+0 and has haste as long as you've cast an instant or sorcery spell this turn.
When Vithian Arcanist enters, add {U}{B}{R}. Spend this mana only to cast instant and/or sorcery spells.

Choose one —
• Destroy target noncreature, nonland permanent.
• Put a -1/-1 counter on each creature.

Wanderer's Sky enters tapped.
As Wanderer's Sky enters, choose a color other than blue.
{T}: Add {U} or one mana of the chosen color.

Unceasing Flames deals X damage to any target, where X is 2 plus the number of cards named Unceasing Flames in your graveyard.
Conjure three cards named Unceasing Flames and shuffle them into your main library.

Put target artifact, enchantment, or card in a graveyard on the bottom of its owner's library.

Conjure a card named Ancestral Recall, a card named Time Walk, and a card named Timetwister into your main library, then shuffle.
Draw three cards. Exile Power Control.

Counter target instant or sorcery spell you don't control unless its controller copies it twice. You gain control of those copies and may choose new targets for them.

Flash
Defender
When Majestic Garrison enters, another target creature you control gains indestructible until end of turn.

This spell costs {X} less to cast, where X is half the number of creatures on the battlefield, rounded down.
Destroy all creatures.

Deathtouch
Whenever Phantasmal Stalker deals damage to a planeswalker, destroy it.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

If you would lose the game, instead sacrifice a storied permanent. If you do and your life total is less than 1, it becomes 1.

Whenever a creature dealt damage by Mooncursed Howler this turn dies, create a 2/2 red Werewolf creature token with first strike.

You may have Crossroads Town enter tapped. If you do, search your library for a basic land card, reveal it, then shuffle and put that card on top.
{T}: Add {C}.

Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
Whenever one or more cards are put into your graveyard from your hand or library, you may return one of those cards to your hand. Do this only once each turn.

Wu Xing (Add effects based on the number of colors of mana spent to cast this spell.)
1 | Counter target permanent spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
3 | You gain life equal to its mana value.

Vigilance
Whenever Kodaichi Bladedancer attacks, target creature gets +2/+2 until end of turn.