msem-instigator

Blade of the Many can be attached only to a nonlegendary creature.
Equipped creature gets +2/+2.
Each other creature you own is a copy of equipped creature.
Effects that would cause permanents you own to become creatures cause them to become copies of equipped creature instead.
Equip {6}

Antu, Sun Spirit can't attack or block unless you control ten or more permanents.
As long as it's your turn, other creatures you control get +X/+0 and have haste, where X is the amount of life you've gained this turn.
When Antu dies or is put into exile from the battlefield, you may put him into his owner's library third from the top.

{T}: Look at the top card of your library. If it's a land card, you may reveal it and put it into your hand.
Crew 2 (Tap any number of creatures you control with total power 2 or greater: This Vehicle becomes an artifact creature until end of turn.)

{3}{G}: Put a +1/+1 counter on Lifecaller Dryad.

As Nebula of Empty Gold enters, choose two or three colors. You lose life equal to the number of colors chosen this way.
{T}: Add one mana of any of the chosen colors.

Create two 1/1 red and white Sand Warrior creature tokens.

Trample
Whenever Wun Su, Guru of the Staff deals combat to a player, you may create Wun Su's Staff, a legendary colorless Equipment artifact token with “Equipped creature gets +5/+5” and equip {5}, then attach it to Wun Su.

Flash
Enchant creature
Enchanted creature gets -3/-0 and doesn't untap during its controller's untap step.

Flying
When Trove Keeper dies, create two Treasure tokens.

When Gamhaugen Stablehand enters, put a +1/+1 counter on target creature you control. You gain 1 life.

When Suitor of the Glade enters, put two +1/+1 counters on target creature you control. It gains vigilance until end of turn.

Sacrifice two lands, Mill five cards: Return Jack, Horrific Harvester from your graveyard to your hand.
[+1]: You gain 2 life and each opponent loses 2 life.
[–2]: Return up to one target creature card and up to one target land card from your graveyard to your hand.
[–2]: Each opponent sacrifices the nonland permanent they control with the greatest mana value among permanents they control.

Put a +1/+1 counter on target creature. It gains hexproof until end of turn.

When Darna's Grimoire enters, you may discard a card. If you do, draw a card.
{2}, Sacrifice Darna's Grimoire: Draw a card.

Kinjiru Assailant has haste as long as an opponent controls a nonbasic land.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Create two 1/1 colorless Construct Actor creature tokens.
II, III — Creatures you control gain flying until end of turn. Whenever one or more of them deals combat damage to a player this turn, draw a card.
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{T}: Add {C}.
{1}, {T}, Sacrifice Morphic Verge: Choose two different basic land types. Create a colorless land token that's the chosen types.

Counter target spell. Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

When this creature enters, create a 1/1 white Bird creature token with flying.
{3}{W}, Exile this card from your graveyard: Create a 1/1 white Bird creature token with flying. Activate only as a sorcery.

Trample
Whenever Cacophonous Demon deals combat damage to a player or planeswalker, you may exile target artifact or enchantment.
Whenever a creature deals damage to you, tap that creature. It becomes an enchantment in addition to its other types.

{T}: Add {C}.
Dominance — {1}, {T}: Blistering Boneyard deals 1 damage to each opponent. Activate only if you control the creature with the greatest power or tied for the greatest power.

Thriving Isle enters tapped.
As Thriving Isle enters, choose a color other than blue.
{T}: Add {U} or one mana of the chosen color.

Perish Song enters with three time counters on it.
At the beginning of your upkeep, remove a time counter from Perish Song. Then if it has no time counters on it, sacrifice it and destroy all creatures.

Trial 4 (As you cast this spell, an opponent of your choice may pay 4 life. If they don't, they fail the trial.)
When Treacherous Devil enters, if an opponent passed the trial, that player gains control of Treacherous Devil.