msem-instigator

This spell costs {X} less to cast, where X is the greatest power among creatures you controlled that died this turn.
Flash
Flying, trample

Deathtouch
Whenever Oozing Adder attacks, you may have target creature defending player controls block it this combat if able.

Perfect the Models deals 3 damage to any target and you gain 3 life. You may play an additional land this turn.
{5}{B}{R}{G}, Exile Perfect the Models from your graveyard: Create three 3/3 black Demon Horror creature tokens. They gain haste and indestructible until end of turn. Activate only as a sorcery.

Flying
Cards in graveyards lose all names, card types, and abilities.
Spells and abilities your opponents control can't cause you to sacrifice Manticores.

({T}: Add {B}, {R}, or {G}.)
Primal Dominion enters tapped.

Tap X untapped Shamans you control: Ravik, Still-Smoke Seer deals X damage to any target and you gain X life.

{3}{B}: You mill two cards. Each opponent loses 2 life.
{1}{G}: You may put a land card from your hand or graveyard onto the battlefield tapped.

Savage Lands enters tapped.
{T}: Add {B}, {R}, or {G}.

({T}: Add {R}.)
Spire Sanctuary enters tapped with two sanctum counters on it.
{T}, Remove a sanctum counter from Spire Sanctuary: Add {B} or {G}.

{T}: Add {B}, {R}, or {G}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Each player chooses up to half the creatures they control, then sacrifices the rest.

Search your library for a card, put it into your hand, shuffle, then add three mana in any combination of colors.
{1}, Discard Tahli's Council: Add one mana of any color. Scry 1.

Flying
At the beginning of combat on your turn, gain control of up to one target creature an opponent controls. If you do, untap it, and it gets +4/+4 and gains flying and haste until end of turn. Sacrifice it at the beginning of the next end step.

Whenever Thrinax Sporemother or another nontoken creature you control dies, create a 1/1 green Saproling creature token.
Whenever a creature card is exiled from your graveyard, create a 1/1 green Saproling creature token.

At the beginning of your end step, draw a card if a creature died this turn. Then Tumultipede deals 2 damage to each opponent if two or more creatures died this turn. Then create three 1/1 green Saproling creature tokens if three or more creatures died this turn.

When Varakna Wurm enters, it deals X damage to target creature an opponent controls, where X is the total number of creature cards you own in exile and in your graveyard.
Cycling {2} ({2}, Discard this card: Draw a card.)

Whenever Watch Me Burn enters or another source you control deals noncombat damage, put an ignition counter on Watch Me Burn. Then it deals damage equal to the number of ignition counters on it to each opponent.

[+1]: Put a +1/+1 counter on up to one target creature, then put your choice of a menace, deathtouch, or trample counter on it.
[0]: Target creature or Xiong planeswalker you control fights target creature you don't control.
[–1]: Target player sacrifices a permanent.

[0]: Sacrifice a creature. When you do, Xiong Mao, Survivalist deals damage to any target equal to that creature's power, then put a number of loyalty counters on Xiong Mao equal to that creature's toughness.
[–2]: Return up to two target creature cards from your graveyard to your hand.
[–6]: You get an emblem with “Whenever a creature you control dies, you may draw cards equal to its power, then you may gain life equal to its toughness.”

[+1]: Create a 1/1 red Panda Monk creature token with “{T}: Target player exiles a card from their graveyard.”
[0]: You may sacrifice a creature. If you do, search your library for a creature card and a land card, reveal them, put them into your hand, then shuffle.
[–2]: Xiong Mao deals damage to target creature or planeswalker equal to the greatest power among creatures you control and cards in your graveyard.
[–7]: Any number of players' life totals each become equal to the number of cards in their graveyard.

[+2]: Create a 3/3 red Panda creature token.
[–X]: Sacrifice a creature. If you do, search your library for a creature card with mana value less than or equal to X plus the sacrificed creature's mana value. Put that card onto the battlefield, then shuffle.
[–6]: You get an emblem with “Whenever a creature dies, this emblem deals damage equal to that creature's power to any target and you draw that many cards.”

[+1]: You may sacrifice a creature. If you do, return a creature card with lesser mana value from your graveyard to the battlefield.
[–1]: Other creatures and planeswalkers you control gain indestructible and can't have counters removed from them until your next turn.
[–X]: Exile X target cards from graveyards. Xiong Mao deals X damage to any target.

Flying
When Zenith of Greed enters, search your library for up to two cards named Treasure Hoard and put them onto the battlefield, then shuffle.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Create a token that's a copy of target Construct you control.
III — Constructs you control get +2/+0 and gain vigilance until end of turn.
​

Search your library for a creature card with mana value 3 or less, put it onto the battlefield, then shuffle. It gains haste until end of turn. Return it to your hand at the beginning of the end step.