msem-instigator

When Persecutor of Truths enters, return target creature card with mana value 2 or less from your graveyard to the battlefield.
Once each turn, when you cast a spell from anywhere other than your hand or another nontoken creature you control enters and wasn't cast, you may draw a card.

Whenever you cast a spell from anywhere other than your hand, return Ruthless Bakhtak from your graveyard to your hand.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Whenever Andazir enters or transcends, each opponent sacrifices a nonland permanent.
{1}{B}{R}: Demon — Create four 1/1 black Snake creature tokens with deathtouch.
{2}{B}{R}: Elder — You draw three cards and you lose 3 life.

Flying
{1}, Sacrifice a creature: Put a +1/+1 counter on Bloodthirsty Manticore. It gains indestructible until end of turn. Tap it.
Surpass {4}{B}{R} ({4}{B}{R}: Transform this creature. This costs {1} less to activate for each counter on it. Activate only as a sorcery.)

Flying, menace
Sacrifice a creature: Put two +1/+1 counters on Bloodclaw Demon. It gains indestructible until end of turn.

{1}, Sacrifice a creature: Create a Treasure token. Exile the top card of your library. You may play that card this turn.

{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.”

Trample, haste
Herald of Untold Riches gets +1/+1 for each color among other spells you've cast this turn.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Haste
At the beginning of combat on your turn, sacrifice Sahra unless he entered the battlefield or transcended this turn.
{R}{G}: Demon — Discard up to two cards. Draw that many cards plus one.
{2}{R}{G}: Elder — Destroy each artifact and enchantment you don't control.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Vigilance, trample
{G}{W}: Demon — Abwad Kahroba gains “At the beginning of combat on your turn, you may put a +1/+1 counter on another target creature.”
{X}{G}{W}: Elder — Create X 2/1 black Horror creature tokens. You gain X life.

(As an Encounter enters, choose an opponent to protect it. You and others can attack it. When defense counters are removed, create a 0/0 Army token if you don't control one, then put that many +1/+1 counters on a Army you control.)
When A Matricide Most Foul enters or is defeated, each opponent exiles a permanent they control with the highest mana value among nonland permanents they control.

If one or more counters would be put on a creature you control, that many plus one of each of those kinds of counters are put on that creature instead.

Flying
When Angel of Despair enters, destroy target permanent.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
When Mahara enters, if you cast them, destroy all other creatures.
{W}{B}: Angel — You gain 4 life and amass Soldiers 4. (Put four +1/+1 counters on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)
{5}{W}{B}: Elder — Amass Soldiers 20.

{W}{B}, Pay X life: Return target creature card with mana value X from your graveyard to the battlefield with a finality counter on it. Activate only as a sorcery and only once each turn.
{W}{B}, Pay 3 life: Return Mehr's Last Captain from your graveyard to the battlefield with a finality counter on it.

Whenever you cast your first noncreature spell each turn, you may cast a creature spell with lesser mana value from your hand without paying its mana cost.
Whenever you attack with three or more creatures, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
The first instant or sorcery spell you cast on each of your turns costs {U/R} (or {1}) less to cast.
{U}{R}: Angel — Put a flying counter and a prowess counter on Rahstahde.
{5}{U}{R}: Elder — Exile any number of instant and/or sorcery cards from your graveyard. For each card exiled this way, copy it. You may cast the copies without paying their mana costs.

Whenever you cast a noncreature spell, put a number of charge counters on Selection at Danaj equal to that spell's mana value.
At the beginning of your end step, you may remove four charge counters from Selection at Danaj. If you do, look at the top four cards of your library, put one into your hand and the rest on the bottom of your library in a random order.

Whenever you cast an Azra spell, mill three cards.
Whenever you cast a Demon spell, you may return an Azra card with lesser mana value than that spell from your graveyard to the battlefield.

Other Azra and Demons you control get +1/+1.
As long as you control three or more other Azra and/or Demons, Herald of Tamaak gets +1/+1 and has flying.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Flying
Tamaak the Arid Swarm can only transcend if you've sacrificed a permanent this turn.
{B}{G}: Demon — Create two 1/1 black Insect creature tokens with flying.
{X}{B}{G}: Elder — Destroy each other nonland, nontoken permanent with mana value X or less.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Whenever Cyrukan enters or transcends, create two 1/1 white Soldier creature tokens with haste.
{2}{R}{W}: Angel — Creatures you control get +1/+0 and gain first strike until end of turn.
{3}{R}{W}: Elder — Creatures you control gain lifelink and vigilance until end of turn.

(As an Encounter enters, choose an opponent to protect it. You and others can attack it. When defense counters are removed, create a 0/0 Army token if you don't control one, then put that many +1/+1 counters on a Army you control.)
Whenever a creature you control attacks Figments of the Muktann, create a token that's a copy of that creature that's tapped and attacking the player protecting Figments of the Muktann. Sacrifice the token at the beginning of the next end step.

Lifelink
Whenever Zagos Abomination attacks, exile another target creature you control, then return it to the battlefield under your control tapped and attacking. It gains menace until end of turn.

Amass Soldiers X, where X is the number of counters on permanents you control. (Put X +1/+1 counters on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)