msem-instigator

Chained Wildborn can't attack or block alone.

Whenever Masha's Vanguard deals damage to a player, you may put a creature card with mana value X or less from your hand onto the battlefield, where X is the amount of damage dealt this way.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Lifelink
Demon spells you cast cost {B} less to cast and an additional 2 life to cast.
{3}{B/R}{B/R}: Demon
Discard your hand. Draw a number of cards equal to the greatest power among Demons you control.
{5}{U/B}{U/B}: Noble
Gain control of target creature. You lose life equal to its mana value.

Each other Okus planeswalker you control enters with two additional loyalty counters on it.
[–2]: Each opponent discards a card and loses 2 life.

Whenever you detain a permanent, you gain life equal to that permanent's mana value.

Choose a nonland permanent type, then destroy all nonland permanents that aren't of the chosen type.

Search your library and/or graveyard for a creature card with mana value X or less and put it onto the battlefield with an additional -1/-1 counter on it. If you search your library this way, shuffle.

Put a +1/+1 counter on target attacking creature.
Draw a card.

When Queue Bouncer enters, return target creature to its owner's hand. If you control another Actor, instead put that creature on top of its owner's library.

When Crooked Merchant dies, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Vigilance

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Choose a color. Target player reveals their hand and you choose a card of that color from it. If you do, that player discards that card and you lose 1 life.

Whenever a creature is returned to your hand, scry 1.
{4}{G}{U}: Reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield.

Menace
{3}{B}, Discard a card: Unhallowed Singers gets +3/+0 until end of turn. Whenever it deals combat damage to a player this turn, they discard a card.

Glitch {1} (Remove one [restriction] for each time you pay the glitch cost.)
Take an extra turn after this one.
[Skip the untap step of that turn.]
[Skip the draw step of that turn.]
[Skip the combat phase of that turn.]
Exile Cut Causality.

You may play cards you own from outside the game.

Trample
When Shigurei, the Floodbringer enters, up to three target permanents become colorless Island lands.

When Ruler of Cities enters, you may search your library for an Aura that could enchant a land you control, reveal it, put it into your hand, then shuffle.
Whenever an Aura becomes attached to a land you control, you gain 2 life.

Prevent all combat damage that would be dealt to and dealt by creatures this turn.

Flash
This spell can't be countered.
Whenever Shigurei attacks, you may activate an ability of a creature you control without paying its cost.
{1}{G}{U}: Target permanent becomes a colorless Island land until end of turn.

{T}: Add {C}.
{2}{G}, {T}: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
At the beginning of combat on your turn, if you control ten or more lands, you may pay {3}{G}{G} and exile this land. When you do, untap any number of lands you control. They become 2/2 green Elf creatures with haste in addition to their other types.

{2}{R}, Sacrifice an artifact or land: Draw a card. Edelber Mine Captain deals 1 damage to each opponent.

Trample, haste
When Red Pelt Hart deals combat damage to a player, return it to its owner's hand.
At the beginning of your end step, sacrifice Red Pelt Hart.

Create a tapped colorless enchantment land token named Paradise with hexproof and “{T}: Add one mana of any color.”
Flashback—{1}{G}, Sacrifice a creature or land. (You may cast this card from your graveyard for its flashback cost. Then exile it.)