msem-instigator

Counter target spell. Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

At the beginning of your upkeep, for each of your libraries, look at the top card of that library, then put it on the top or bottom of that library.
{2}, Pay 2 life: Draw a card.

{1}{R}, Sacrifice Crackling Seaform: Counter target spell unless its controller has Crackling Seaform deal 3 damage to them.

Protection from colored spells
{5}{C}{C}: Exile target colored permanent.
{5}{C}{C}, Exile Soul of Muetar from your graveyard: Exile target colored permanent.

Whenever you cast a spell with mana value greater than Script Jockey's power, put a +1/+1 counter on Script Jockey.

At the beginning of combat on your turn, create a 1/1 red Nomad creature token with haste.
At the beginning of your upkeep, if you control five or more creatures, you may transform Emerabi and Sunnula.

You draw a card, lose 2 life, then create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

Target player reveals their hand and discards all nonland cards that share a name with a card in their graveyard. If no cards were discarded, draw a card.

Flying, haste
Whenever Guardian of the Devout attacks or blocks, other creatures you control gain indestructible until end of turn.

Target creature gets +2/+2 and gains flying and lifelink until end of turn.
Orchestrate {W} (You may exile this card from your hand anytime you could cast a sorcery for its orchestrate cost. When you next resolve a spell, you may cast this from exile without paying its mana cost.)

When Confine to the Oasis enters, exile target nonland permanent an opponent controls until Confine to the Oasis leaves the battlefield.
Whenever an opponent casts a spell, put a searching counter on Confine to the Oasis for each of that card's colors. Then if there are ten or more searching counters on Confine to the Oasis, sacrifice it and you gain 3 life.

Trample
Volcanic Terror gets +1/+1 for each land card in all graveyards and in exile.

Put a +1/+1 counter on target creature. It gains first strike until end of turn. You gain 2 life.

Put target creature card from a graveyard onto the battlefield under your control. If it doesn't have vanishing, put three time counters on it and it gains vanishing. (At the beginning of your upkeep, remove a time counter from that permanent. When the last is removed, sacrifice it.)

Whispering Canal enters tapped unless you control a basic land.
{T}: Add {U} or {B}.

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, arm that creature. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

Gain control of target attacking creature until end of turn. Untap it. It gains indestructible until end of turn.

Each opponent loses 2 life. Scry 1.
Showcase {3}{B} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

Art of war — At the beginning of your end step, if Teikoku Daimyo dealt damage to an opponent this turn, put a +1/+1 counter on each creature you control that attacked this turn.

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast Aura or Aurashaper spells.

Art of war — At the beginning of your end step, if Kurayami Butcher dealt damage to an opponent, you may destroy target creature that was dealt damage this turn.

When Prophetic Prismite enters, draw a card.
{2}: Add one mana of any color.

As an additional cost to cast this spell, you may tap any number of untapped tokens you control. This spell costs {1} less to cast for each token tapped this way.
Whenever Organic Dreadnought enters or attacks, tap target permanent an opponent controls. That permanent doesn't untap during its controller's next untap step.

Adorned — As long as Silverwork Champion is equipped and/or enchanted, it gets +2/+2 and has trample.

Archive 6 (As this enters, shuffle the top six cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever one or more Dragons you control attack, you may cast the top card of the archived library without paying its mana cost.