msem-instigator

Enchant player
Whenever enchanted player casts a spell, Curse of Raining Daggers deals 1 damage to them.
Whenever one or more creatures deal combat damage to enchanted player, you create a Weapon token. When you do, attach it to target creature you control. (A Weapon token is an Equipment artifact with “Equipped creature gets +1/+1” and equip {2}.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — You may exile target nonland permanent. If you do, you lose 3 life.
III — Create a 7/7 white, black, and green Horror Knight creature token with trample and “Whenever this creature is dealt damage, you lose that much life.”
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As an additional cost to cast this spell, sacrifice a token or pay 2 life.
Draw two cards.

Advance {3}{B}{B} (Cast this for {3}{B}{B} to advance it as it enters. {3}{B}{B}: Advance this as a sorcery.)
Whenever Tireless Archivist advances, search your library for a card, put it into your hand, then shuffle.

Put three -1/-1 counters on target attacking or blocking creature.

Lionize {G} ({G}, Exile this card from your hand: Put a +1/+1 counter on target creature and it gains the following abilities until end of turn. You may cast this card on a later turn from exile.)
Vigilance, reach

Target opponent may draw two cards. If they do, you draw four cards. Otherwise, you create four 1/1 red Elemental creature tokens.

Trample
When Arpechian Yatte enters, put a +1/+1 counter on each other creature you control.
Whenever another creature you control enters, put a +1/+1 counter on Arpechian Yatte.

Flying
Whenever another creature enters, you gain 1 life.

You may put a creature or planeswalker card from your hand onto the battlefield. If it's a creature, it gains haste and indestructible. Return it to your hand at the beginning of your next end step.

Whenever a creature you control dies, put a unity counter on The Blacksmith's Banner.
Creatures you control have vigilance and get +1/+1 for each unity counter on The Blacksmith's Banner.

Flying
Whenever Naiala's Guide deals combat damage to a player, draw a card, then discard a card.

Flying
When Kinjiru Sandshaper enters, tap target creature.

When Heirloom Seeker enters, you may search your library for an Equipment card, reveal it, then shuffle and put that card on top of it.
Heirloom Seeker has first strike as long as it's equipped.

{3}, {T}: Tap target creature.

Forbidding Isle enters tapped unless you control a Swamp.
{T}: Add {U} or {R}.

Haste
This creature can't block.
{2}{R}: Return this card from your graveyard to your hand.

As an additional cost to cast this spell, discard a card.
Draw two cards.

Choose one —
• Target creature gains indestructible and lifelink until end of turn.
• Destroy target artifact or enchantment.

Equipped creature gets +1/+1.
As long as equipped creature is multicolored, it gets an additional +1/+1.
Equip {1}

Whenever you cast an instant or sorcery spell, each opponent loses 1 life.
Attain {3}{B} ({3}{B}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

Destroy target tapped creature.

Menace (This creature can't be blocked except by two or more creatures.)
Whenever Slaughtered Steps Taskmaster attacks, you may sacrifice another creature. If you do, Slaughtered Steps Taskmaster gets +2/+0 until end of turn.

Reveal the top two cards of your library. Put up to one land card and up to one nonland card from among them into your hand. Put the rest on the bottom in any order.

Whenever one or more creatures you control attack, you may put a progress counter on Battlesuit Prototyping.
[progress 2-6] Creatures you control get +1/+1.
[progress 7+] Creatures you control get +2/+2 and have indestructible.
Creatures you control get +2/+2 and have indestructible.