msem-instigator

Create two 1/1 red and white Warrior creature tokens. Those tokens gain first strike until end of turn.

{2}{G}: Look at the top three cards of your library. You may reveal a creature or Revelation card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Enchant creature
Enchanted creature has double strike.
Whenever enchanted creature deals combat damage to an opponent, exile the top card of your library. You may play that card this turn.

When El, Humble Apprentice enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Chosen one ({W}{U}{B}{R}{G}: Transform this permanent.)

When this creature enters, create a Weapon token, then attach it to a creature you control. (It's an Equipment artifact token with equip {2} and “Equipped creature gets +1/+1”.)
Arise {5}{R} ({5}{R}, Exile this from your graveyard as a sorcery: Create a black token copy of it that's also a Zombie and can't block.)

When Forbidden Shiangshi Arts enters, each player mills three cards.
{2}{B}: Exile target creature card from a graveyard. Create a tapped token that's a copy of that card, except it has “When this creature deals damage, sacrifice it.”

Flying
Erratic (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)
Whenever Zaidha, Seraph of Calamity deals combat damage to a player, choose up to two target nonland permanents that player controls and target nonland permanent you control. Destroy one of those permanents at random.

As Scion of Silence enters, choose a nonland card name.
Other permanents with the chosen name lose all abilities.

Flying
Death knell — Put a flying counter on target creature you control. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)

Love Letters enters with X stamp counters on it.
Whenever one or more creatures you control deal combat damage to a player, you may remove a stamp counter from Love Letters. If you do, draw a card.

Draw a card. If this spell was foretold, instead surveil 2, then draw two cards.
Foretell {2}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

You may play lands from your graveyard.
{B}{G}, Sacrifice three lands: Return Endrison Nourisher from your graveyard to your hand.

First mate—Each nonland card in your starting deck is an instant or has flash. (If this card outside the game is your chosen first mate, you may swap it with a card in your opening hand.)
Flash
When Mable enters, you gain 2 life and draw a card.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Reach
Prismatic — Whenever you cast a multicolored spell, you gain 2 life.

Magma Bolt deals 2 damage to any target. If a creature dealt damage this way would die this turn, exile it instead.

Ward—{2} or 2 life. (Whenever this becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2} or 2 life.)
Whenever another permanent becomes the target of a spell you control, create a token that's a copy of it. Sacrifice that token at the beginning of your next turn's end step.

If a creature entering under you control causes an ability to trigger, you may pay -1. Whenever you do, copy that ability. You may choose new targets for the copy.
[+1]: Exile target creature. Return that card to the battlefield tapped under its owner's control at the beginning of the next end step. If you don't control it, it enters with a stun counter.
[–2]: Draw a card and gain 2 life.

Hozen Shrine enters tapped.
{T}: Add {U} or {B}.
{U/B}, {T}, Sacrifice Hozen Shrine: Put a +1/+1 counter on target creature you control. Activate only as a sorcery.

(Choose only one work as a sorcery to add its ability.)
When The Art of War enters, if a source you control would deal damage this turn, it deals double that damage instead.
{2}{R}{R}: Laying Plans
Whenever you attack for the first time each turn, untap each creature you control. After this phase, there is an additional combat phase.
{2}{R}{R}: Waging War
Whenever a creature you control attacks, create a token that's a copy of it that's tapped and attacking, except the token isn't legendary. Exile those tokens at end of combat.

When Ritesinger Shaman dies, each player discards a card.

Whenever a creature you control dies, put a +1/+1 counter on Agent of Andazir.

I, II — Put a +1/+1 counter on target creature you control.
Discovery — Creatures you control with +1/+1 counters on them have lifelink.

When Servant of Armageddon dies, destroy all creatures.

Flying
Whenever Coasting Shaledrake deals combat damage to a player, scry 1.