msem-instigator

At the beginning of your end step, you may put a progress counter on Custom Armaments.
[progress 1-3] Sacrifice Custom Armaments: Destroy target blocked creature.
[progress 4+] Sacrifice Custom Armaments: Exile up to two target blocked creatures.
Sacrifice CARDNAME: Exile up to two target blocked creatures.

Whenever equipped creature attacks, create a token that's a copy of it and that's tapped and attacking, except that token isn't legendary if equipped creature is legendary. Exile that token at end of combat.
Equip {3}

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
As long as Daring Cavalier is renowned, it has trample.

All creatures get -3/-2 until end of turn.
Coalesce {6}{B}{B} (You may cast this from your graveyard for {6}{B}{B}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

Return up to one target creature card from a graveyard to the battlefield under your control.
Coalesce {9}{B} (You may cast this from your graveyard for {9}{B}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)
Indestructible

Target opponent reveals their hand. You choose a creature or sorcery card from it and exile that card.

Whenever a source you control deals damage to a creature or planeswalker an opponent controls, exile that creature or planeswalker.

Choose one —
• Target creature gets -2/-2 until end of turn.
• Remove up to two counters from target permanent.

{2}{B}, Sacrifice Determined Slayer: Exile up to three target cards from target player's graveyard. They lose that much life.

Equipped creature gets +2/+2 and has flying.
At the beginning of your upkeep, if Devised Battlesuit is attached to a non-Artificer creature, sacrifice Devised Battlesuit.
Equip {4}

Until end of turn, target blocked creature you control gains trample and “Whenever this creature deals combat damage to a player, draw that many cards.”

Enchant artifact or creature
When Dilapidate enters, tap enchanted permanent.
Enchanted permanent loses all abilities and doesn't untap during its controller's untap step.

When Diligent Analyst enters, you may put an progress counter on a Project you control.
Diligent Analyst gets +1/+1 as long as you control two or more enchantments.

Enchant creature
Enchanted creature can't attack or block.

Flying
When Djinni of Whispers enters, untap up to three Islands.

Dominik's Shack enters tapped.
When Dominik's Shack enters, you may mill two cards.
{T}: Add {B} or {G}.

Target creature you control gains deathtouch until end of turn. It fights another target creature.

Douse in Flame deals 5 damage to target creature without flying. When that creature leaves the battlefield this turn, exile its controller's graveyard.

When Drift Tracer enters, search your library for a basic land card that shares a type with a basic land you control and put it onto the battlefield tapped, then shuffle.

Each player mills five cards.
Coalesce {4}{U}{B} (You may cast this from your graveyard for {4}{U}{B}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)
Drink Thoughts Like Oil can't be blocked.

{2/G}, {T}: Put a +1/+1 counter on target creature you control.

Target creature gets -3/-3 until end of turn.

First strike, menace
Whenever Dueling Duo or another creature you control becomes blocked, that creature deals 1 damage to each creature blocking it.

Flying
When Dune Wraith enters, distribute two +1/+1 counters among Spirits you control.

When Dutiful Camel enters, put a +1/+1 counter on target creature you control.