msem-instigator

Destroy target face-up creature.

Flying
When Aven Merchant enters, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Sunrise Bluffs enters tapped.
{T}: Add {R}.
You may untap Sunrise Bluffs during each other player's untap step. Whenever you do, you lose 1 life.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)

Menace
Whenever Margarete or another creature you control dies, up to one target creature you control cackles. (Put a menace counter on it. If it already has menace, it deals 1 damage to each opponent instead.)
Once each turn, when Margarete or another creature you control with menace dies, you may torment each opponent. (They lose 3 life unless they discard a card or sacrifice a nonland permanent.)

Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
If a player casting a noncreature spell would cause an ability of a permanent you control to trigger, that ability triggers an additional time.

Destroy up to one target creature with flying or enchantment. Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

During your turn, cards in your hand have cycling {X}, where X is the number of cards you've discarded this turn.
At the beginning of each end step, create a 1/1 blue Tentacle creature token for each card you discarded this turn.
Cycling {R} ({R}, Discard this card: Draw a card.)

{R}{G}, Reveal Living Supernova from your hand: Put a land card from your hand onto the battlefield tapped. Activate only as a sorcery.
Whenever Living Supernova or a land you control enters, exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Whenever a player casts a spell, put a doom counter on Foreboding Presence.
At the beginning of each player's end step, if no spells were cast this turn, sacrifice Foreboding Presence. It deals damage equal to the number of doom counters on it to that player.

Create a 2/2 black Horror creature token.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

Vigilance
Players can't untap more than two lands during their untap steps.

When Lich's Grimoire enters, create a 2/2 black Zombie creature token.
{2}{B}, {T}: Target opponent loses 1 life. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

At the beginning of your end step, if you're horrific, you draw a card and you lose life equal to the number of cards in your hand. (You're horrific as long as you've sacrificed a permanent or discarded a card this turn.)

Whenever a creature enters, it deals damage equal to its power to any target of its controller's choice.
When Interplanar Raid enters, you may aetherize target creature you control. (To aetherize, create a token that's a copy of it, then exile that token.)

Destroy target artifact or enchantment. If you controlled that artifact or enchantment, draw two cards.

Sacrifice a creature: Put a +1/+1 counter on Masked Assailant. It gains menace until end of turn. Activate only as a sorcery.

When Wild Waypoint enters, create a 1/1 green Scout creature token.
{T}: Add {B}, {G}, or {U}.

Prevent all combat damage that would be dealt this turn except by creatures you control with +1/+1 counters on them.

Creatures you control gain vigilance until end of turn. After this main phase, there's an additional combat phase followed by an additional main phase.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

Whenever you make first contact, create a Treasure token. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)
{T}, Return an artifact with mana value X you control to its owner's hand: You may cast a spell with mana value X plus 1 or less and with a different name from your hand without paying its mana cost.

Creatures you control get +0/+1 and can attack as though they didn't have defender.
Whenever three or more creatures you control attack or block, each creature you control assigns combat damage equal to its toughness rather than its power this turn.

[+1]: For each player, exile the top three cards of that player's library, then put one of those cards into that player's hand.
[0]: Choose target card exiled by Rahit. Until your next turn, you may play that card, and you may spend mana as though it was mana of any type to cast it.
[–7]: Target player draws seven cards.