msem-instigator

Once each turn, when a player loses life, you may harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Each opponent loses 1 life and you gain that much life.

When Conduit of the Conflux enters, scry 2.
{T}: Add one mana of any color.

Prowess
Whenever Outsider Alchemist deals combat damage to a player, create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

When Gulch Custodian enters, return an artifact you control to its owner's hand.

({T}: Add {W}.)
Bustling Docks enters tapped.
{W}, {T}, Reveal a white card from your hand: Target creature gets +1/+0 until end of turn.

When Conjured Shade dies, target creature you don't control gets -1/-1 until end of turn.

Creatures you control get +2/+2.
Wanderlust — As long as you control four or more differently named lands, creatures you control have trample and can't be blocked by more than one creature.

Whenever Kan'Gi, the Reverent perseveres, gain control of target creature an opponent controls with power less than or equal to Kan'Gi's power. (A creature perseveres when it survives damage.)

{3}{B}, {T}: Choose a card name. Target player reveals cards from the top of their library until they reveal a card with the chosen name. If they do, put the revealed cards into their graveyard. Otherwise, they shuffle their library.

Vigilance
When Illari, Martyrized Tyrant enters, tap all other nonbasic permanents.
Players can't untap more than one nonbasic permanent during each of their untap steps.
When Illari dies, untap all permanents you control and you gain 5 life.

Prowess
Whenever you cast your first noncreature spell during each of your turns, create a 1/1 blue Reflection Wizard creature token with prowess.

Deathtouch

Arcane Sanctum enters tapped.
{T}: Add {W}, {U}, or {B}.

When Wilting Waif dies, each opponent discards a card at random and you scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Whenever New Alores Charmer attacks, you may tap target creature.

Counter target spell if you have more cards in hand than its controller.

Menace
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.)

Bronze Giant has trample as long as you control a token creature.

{T}: Add {C}.
Satrapies you control have “{1}{R}, {T}, Discard a card: Draw a card.”

Reveal cards from the top of your library until you reveal a land card, then put that card onto the battlefield tapped. You may put another card revealed this way on top of your library. Put the rest of the cards revealed this way on the bottom in a random order.

Exile target creature and all other creatures with the same name as that creature. Search all graveyards, hands, and libraries for any number of cards with the same name as that creature and exile them. Then players shuffle their libraries searched this way.

Equipped creature has indestructible as long as it's tapped.
Equip {3}

Whenever you cast a spell that's red, green, white, or blue, each opponent loses 1 life and you gain 1 life.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Whenever you cast an enchantment spell, draw a card.
I, II — Tap up to one target nonland permanent and put a stun counter on it. You gain 2 life.
III — Target creature you control gets +1/+1 until end of turn for each enchantment you control.

Creatures you control get +1/+1 and gain trample until end of turn.
Fuse (You may cast one or both halves of this card from your hand.)