msem-instigator

If Madame Beatrice would leave the battlefield, exile her instead.
Whenever one or more creatures you control deal combat damage to a player, that player reveals their hand. You may cast a card from their hand without paying its mana cost.

Players can't sacrifice creatures to cast spells or activate abilities unless that player sacrifices an additional creature. The same is true for discarding cards and paying life.

Whenever an opponent activates an ability of a permanent, if it isn't a mana ability, you gain 1 life and create a Gold token. (It's an artifact with “Sacrifice this artifact: Add one mana of any color.”)

Haste
Whenever you cast a spell, if you spent mana to cast it, draw a card. Then you may cast a card with mana value less than that spell's mana value from your hand without paying its mana cost.

Menace
Stampede — Whenever Maelstrom Slicer and a creature with greater power attack, exile the top three cards of your library. You may play those cards until end of turn.

Protection from sorceries
Whenever Magdel, Caller of Souls attacks, create a 1/1 white Spirit creature token with flying that's tapped and attacking for each storied permanent you control. Exile the tokens at end of combat. (Enchantments and legendary permanents are storied.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Exile up to one target creature you control. At the beginning of your next end step, return it to the battlefield.
Until end of turn, if a creature entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
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Whenever a creature dies, scry 1 and each opponent loses 1 life.

Activated abilities of nonland permanents cost {2} more to activate.

As Magmatic Torrent enters, you may pay 2 life. If you don't, Magmatic Torrent enters tapped.
{T}, Sacrifice Magmatic Torrent: Search your library for an Island or Mountain card, put it onto the battlefield, then shuffle.

Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Magnitude deals X damage to each player and each creature without flying that didn't harness it.

Trample
Other Beasts you control have trample.
Whenever Magnoceros attacks, create a 5/5 green Beast creature token that's tapped and attacking.

If a red instant or sorcery spell you control or a red planeswalker you control would deal damage to a permanent or player, it deals that much damage plus 2 instead.

Whenever an opponent discards a card, you may draw a card.

Lands you control have “{T}: Add one mana of any color.”
{T}: Add one mana of any color.

{X}, {T}: Target player mills X cards.

Whenever you gain life, you may pay {X}, where X is less than or equal to the amount of life you gained. If you do, draw X cards.

Choose two —
• Return up to two target creature cards from your graveyard to your hand.
• Return up to two target enchantment cards from your graveyard to your hand.
• Return up to two target artifact cards from your graveyard to your hand.
• Target player may put a permanent card from their hand onto the battlefield.

Armies you control attack each combat if able.
At the beginning of combat on your turn, recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

({T}: Add {W}, {B}, or {G}.)
Majestic Dominion enters tapped.

Flying
Whenever a permanent you control is returned to your hand, scry 1.

Majestic Tomb enters tapped.
{T}: Add {B} or {R}.
When Majestic Tomb enters, you may put a loyalty counter on a planeswalker you control.

Creatures you control get +2/+2.
Wanderlust — As long as you control four or more differently named lands, creatures you control have trample and can't be blocked by more than one creature.

Double strike, vigilance
Whenever Major Benjamin Stout enters, attacks, or dies, recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

(Choose only one work as a sorcery to add its abilities.)
When Make Art Not Friends enters, create a Treasure token.
{1}{R}: Never Again
Whenever you sacrifice an artifact, that artifact deals 1 damage to each opponent.
{4}{R}{R}: Over It All
At the beginning of combat on your turn, you may have an artifact you control become a 6/6 Golem artifact creature until end of turn.