msem-instigator

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever two or more creatures you control deal combat damage to a player, add a quest counter.
1, 2 — Create a 2/1 black and red Cat Pirate creature token with menace.
3 — Create a colorless artifact token named Motherlode with “{T}: Add two mana of any one color” and
“{3}, {T}, Discard your hand: Draw two cards.”

As Exodus of the Khalizors enters, choose Rehison or Danuri.
• Rehison — Whenever an Elf you control enters, you may move a counter from target creature onto another target creature.
• Danuri — Soldiers you control have trample.

The owner of target creature or planeswalker shuffles it into their library, then they may create two 1/1 blue Bird creature tokens with flying. If they don't, they reveal cards from the top of their library until they reveal a nonland permanent card, then they put that card onto the battlefield and shuffle the rest into their library.

Trample
Whenever Horrific Progenitor deals damage to a player, for each damage dealt, that player loses 3 life unless they sacrifice a nonland permanent or discard a card.

Manifest the top card of your library and the bottom card of your library. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Choose one —
• Return target creature card from your graveyard to your hand.
• Return two target creature cards with total mana value 4 or less from your graveyard to your hand.

When Sandbluff Barflies enters, you gain 2 life.

If you would gain life, you gain twice that much life instead.
If you would draw a card, draw two cards instead.
If you tap a permanent for mana, it produces twice as much of that mana instead.

Put target nonland permanent into its owner's library second from the top.

This spell costs {1} less to cast for each card type among cards in your graveyard.
Scavenge {4}{G}. This ability costs {1} less to activate for each card type among other cards in your graveyard. ({4}{G}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

This spell can't be countered.
Polis's Demise deals 5 damage to each creature. Destroy all artifacts.

Target creature gets +2/+1 and gains trample until end of turn. Create a tapped Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Once each turn, you may reveal a creature card as you draw it. Whenever you do, create a 1/1 green and blue Bird creature token with flying and “{T}: Add one mana of any color.”
Whenever three or more creatures you control deal combat damage to a player, untap each creature you control.

Whenever equipped creature deals combat damage, you may return target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of damage dealt this way.
Equip {1}

When River Miscreants enters, target creature you control can't be blocked this turn.
{2}{U}: Return River Miscreants to its owner's hand. Activate only as a sorcery.

Hexproof
Mist-Valley Ancient enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

(Choose only one work as a sorcery to add its ability.)
When Celebrations of Ferocity enters, add {R}{G}. Spend this mana only to cast creature spells.
{4}{R}{R}: Hao'Tai's Wake
At the beginning of combat on your turn, target creature you control becomes a 4/4 red Dragon with flying until end of turn.
{1}{G}: Portrait of Qiyan
Creatures you control enter with an additional +1/+1 counter on them.

Counter target spell. If a noncreature spell is countered this way, scry 2.

Whenever you cast an instant or sorcery spell, you may conjure two duplicates of it into your main library, then shuffle. Then if there are two or more cards in your graveyard that share a name with that spell, copy it. You may choose new targets for the copy.

Trample
Improve {1}{R} ({1}{R}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Embattled creatures you control get +2/+0. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Creatures you control get +1/+1.
{5}{W}: Create a 1/1 white Soldier creature token. Activate only as a sorcery.

Deathtouch

Enchant creature
Enchanted creature can't attack or block.
Enchanted creature can't be the target of spells or abilities your opponents control.

Flying
Venerable Skyblade can't attack unless defending player controls a creature with flying.
When Venerable Skyblade enters, you may put a +1/+1 counter on target creature you control.