msem-instigator

Flying, menace
Whenever another creature you control deals combat damage to a player, sacrifice it.
If you would draw a card, you may instead return a creature card from your graveyard to your hand.

Menace
When The Duneborn Host enters, mill four cards.
Whenever a card is put into your graveyard from anywhere, each opponent loses 1 life and you gain 1 life.
Whenever a card leaves your graveyard, create a 2/2 black Zombie creature token.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever the second card is put into your graveyard from anywhere each turn, add a quest counter.
You may sacrifice a creature. When you do, you may return target creature card from your graveyard to your hand.
Destroy target nonland permanent an opponent controls.

At the beginning of your upkeep, you lose 1 life, then reveal the top card of your library. You lose life equal to its mana value unless it is a creature card. Put that card into your hand.

Permanent cards in your graveyard have The Undercity Amalgam's Adventure.
Once during each of your turns, you may cast an Adventure spell from your graveyard.

When Threshing Sundew enters, merge up to one target creature card in your graveyard under it. Threshing Sundew has that card's abilities.
When Threshing Sundew dies, return all other cards merged with it to their owner's hand.

Reach
You may have other creatures you control enter as a copy of any creature card in a graveyard with equal or lesser mana value.

Flying
Ward—{2}, Pay 2 life.
At the beginning of your end step, if a card was put into or left your graveyard this turn, put a +1/+1 counter on Tormentor of Graves.

Toxic Jungle enters tapped unless you have 15 or less life.
{T}: Add {B} or {G}.

At the beginning of your upkeep, each player mills two cards, then reveals the top card of their library and puts it on the bottom of their library.

Flash
Deathtouch

Untrekked Territory enters tapped.
{T}: Add {B} or {G}.
When Untrekked Territory enters, you may put a loyalty counter on a planeswalker you control.

Choose one—
• Destroy target permanent with mana value 2.
• Return target permanent card from a graveyard to its owner's hand.
Exile Veil's Recovery.

Primal {1}{B}{B} (During your turn, you may cast this spell for {1}{B}{B} instead of playing a land.)
Deathtouch
When Venomous Gorran enters, if you cast it for its primal cost, it fights target creature.

Destroy target nonland permanent. You may return a card that shares a card type with that permanent from your graveyard to your hand.

You may play an additional land on each of your turns.
{1}{B}{G}, Sacrifice a land: Draw a card.

Overcast — Whenever you cast a spell, create a 1/1 black Bird creature token with flying and menace if {C} was spent to cast it.
Whenever three or more creatures you control deal combat damage to a player, return target card from your graveyard to your hand.

{T}, Pay 1 life: Add {B} or {G}.
{2}, {T}, Sacrifice Walled Garden and another permanent: Draw a card. Activate only during your turn.

When Warden of Rehis-Dorahn enters, put a -1/-1 counter on each creature.
{2}{B}{G}, {T}: Destroy target creature with a counter on it.

Mill five cards, then return up to one permanent card from your graveyard to your hand.

[0]: Create a 2/2 green Panda Bear Monk creature token with “When this creature dies, put a loyalty counter on a Ji planeswalker you control.”
[–2]: Each player sacrifices a nonland permanent. You may return a nonland permanent card from your graveyard to your hand.
[–6]: You get an emblem with “Whenever a permanent you control dies, you may search your library for a card that shares a card type with that permanent and put it onto the battlefield, then shuffle.”

Mill three cards. When you do, return another nonland card from your graveyard to your hand.

When Woopip Bruiser enters, germinate. When you do, you may have target non-Fungus creature get -X/-X until end of turn, where X is the greatest power among creatures you control. (To germinate, put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

[+2]: Put a -1/-1 counter on or remove a -1/-1 counter from up to one target creature.
[–1]: Draw a card, then each player sacrifices a nonland permanent.
[–10]: Destroy all nonland permanents you don't control.

{T}, Sacrifice another creature: Return target creature card with mana value equal to 1 plus the sacrificed creature's mana value from your graveyard to the battlefield. Activate only as a sorcery.