msem-instigator

Harmony — Target creature gains haste until end of turn.
When Streetside Entertainer enters, harmonize. (Trigger up to one harmony of one permanent you control.)

Conjure a card named Ancestral Recall, a card named Time Walk, and a card named Timetwister into your main library, then shuffle.
Draw three cards. Exile Power Control.

Choose X. You may choose the same mode more than once. Create a creature token for each of the chosen characteristics.
• 1/1 white Bird with flying.
• 1/3 blue Turtle.
• 1/1 black Chipmunk with lifelink.
• 1/1 red Rabbit with haste.
• 2/1 green Squirrel with reach.

{T}: Add {C}.
{3}, Discard Ancient Ossuary: Search your library for a land card, reveal it, put it into your hand, then shuffle.

{T}: Create a Treasure token.
{W}{U}{B}{R}{G}: Until end of turn, Guardians of Kallian's Tomb becomes a 5/5 Ox artifact creature and gains trample and “Whenever this creature attacks, defending player sacrifices a permanent unless they have you draw two cards.”

Create three 2/2 green Wolf creature tokens.

Destroy target creature or planeswalker. You gain 1 life and that permanent's controller loses 1 life.

Whenever Ainok Caretaker or another Hound you control attacks, untap that creature and it gets +1/+1 until end of turn.

Lionize {G} ({G}, Exile this card from your hand: Put a +1/+1 counter on target creature and it gains the following abilities until end of turn. You may cast this card on a later turn from exile.)
Vigilance, reach

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

Equipped creature gets +0/+2.
Equip {0}

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

Tribute 1 (As this creature enters, an opponent of your choice may put a +1/+1 counter on it.)
When Haggard Jackal enters, if tribute wasn't paid, each opponent discards a card.

Enchant player
Death knell — Enchanted player loses 1 life and you gain 1 life. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)
Whenever a creature you control dies, enchanted player chooses a death knell ability of a permanent you control. Trigger that ability.

Whenever Organ Scavenger perseveres, each opponent loses 2 life. (A creature perseveres when it survives damage.)

Each player shuffles their hand and graveyard into their library. Then each player draws seven cards. If you didn't control a blue legendary creature or planeswalker as you cast this spell, discard three cards. Exile Entelan Erasure.

Target creature you control gets +1/+0 until end of turn. It fights target creature you don't control.

Equipped creature gets +2/+2.
Equip {3}

When Leyline Invoker enters and at the beginning of your upkeep, you may mill two cards.
{5}{B}, {T}, Sacrifice Leyline Invoker: Return target creature card from your graveyard to the battlefield. This ability costs {1} less to activate for each creature card in your graveyard.

When Sunset Cliffs Lawman enters, you may post a bounty on target creature. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

Each opponent sacrifices an artifact.
Scry 1.
Coalesce {6}{R} (You may cast this from your graveyard for {6}{R}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature gets +2/+3 and has lifelink.

Destroy target artifact or enchantment. You gain 4 life.

When Persecution Official enters, choose a creature card name.
Cards with the chosen name can't be cast.

({T}: Add {R} or {W}.)
Rugged Fields enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)