msem-instigator

Destroy target creature. If an opponent lost life this turn, that creature's controller mills five cards.

Target opponent chooses a number. When they do, choose one —
• That player discards their hand, then draws cards equal to the chosen number.
• Archivist's Torment deals damage to that player equal to the chosen number.

Flash
When Issbarren Warden enters, exile target token.

Draw three cards, then exile three cards from your hand. Until the end of your next turn, you may play those cards.

First strike
Whenever a creature dealt damage by Mournful Newborn this turn dies, transform Mournful Newborn.

Flying
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)

Deathtouch
Instant and sorcery spells you control have deathtouch.
{2}{B}: Exile target creature card from an opponent's graveyard, then create a 2/2 black Zombie creature token and put a +1/+1 counter on Saffrisa, Heir Apparent.

{3}, {T}: Choose a card name, then reveal a card at random from your hand. If that card has the chosen name, Cursed Scroll deals 2 damage to any target.

Flying
Whenever you tap a Mountain for mana, add {R} and that land deals 1 damage to you.
Whenever you tap a non-Mountain land for mana, that land deals 1 damage to Tseng, Warden of the Peak.

As an additional cost to cast this spell, pay {2} or sacrifice a creature.
Menace

Flash
When Culi-Sae Mesmer enters, return all permanents attached to target permanent or player to their owners' hands.

{T}: Add {C}.
{1}, {T}: Add {U}{B}.

Relonche Spy enters under the control of an opponent of your choice.
Relonche Spy can't block.
During each of Relonche Spy's owner's turns, they may cast a card from your graveyard by paying life equal to its mana value rather than paying its mana cost.

Corpse Thief can't be blocked by creatures with greater power.
Whenever Corpse Thief deals combat damage to a player, return target creature card from your graveyard to your hand.
{3}{G}{G}: Mill half your library, rounded down. Transform Corpse Thief. Activate only as a sorcery.

Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase. For each planeswalker you control, you may activate its loyalty abilities an additional time this turn.

Rammanethi Hydroshaper gets +1/+1 as long as you control an Island.
{2}{U}: Target creature blocking or blocked by Rammanethi Hydroshaper gets -1/-0 until end of turn.

Sacrifice another creature: Put a +1/+1 counter on Skieryg Menace.

Return target creature to its owner's hand. Create a 2/2 green Bear Actor creature token.

Erratic (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)
Whenever a creature you control enters, if you didn't cast it from your hand, target land you control becomes a 7/1 red Elemental creature with trample and haste. It's still a land.

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.)

Aetherize up to two target permanents you control. (To aetherize, create a token that's a copy of it, then exile that token.)

Create a number of 3/3 green Elemental creature tokens equal to the number of differently named lands you control.
Fuse (You may cast one or both halves of this card from your hand.)

Lifelink
Whenever you draw your second card each turn, put a +1/+1 counter on Ethereal Runner.

This spell costs {1} less to cast for each card you've drawn this turn.
You may reveal a land card from outside the game and put it into your hand. If it's basic or a Desert, put it into the battlefield instead.

{1}{U}{R}, {T}: Create a token that's a copy of another target creature, except it's an artifact in addition to its other types and has “Whenever this creature is dealt damage, destroy it.”