msem-instigator

Whenever you draw a card, target player mills two cards.
Whenever you cast a blue spell, scry 1, then you may reveal the top card of your library. If it's an instant or sorcery card, draw a card.

Flying
When Winged Guardian enters the battlefield, return up to one target nonland permanent to its owner's hand.

Menace
Whenever Abomination Blackguard deals combat damage to an opponent, you may draw a card. If you do, you lose 1 life.

When Abomination Emissary enters the battlefield, target player mills six cards.

Abomination Sculptor has deathtouch and lifelink as long as it's attacking.

Return up to two target creature cards with mana value X or less from your graveyard to the battlefield. They can't block this turn.

Whenever a creature dies, put a +1/+1 counter on Bog Apex.

Call of the Abyss deals 3 damage to any target and you gain 3 life.

Haste
Coldhearted Explorer can't block.

Augmented — When Dead End Adventurer enters the battlefield, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, destroy target creature you don't control.

Target player sacrifices a creature or planeswalker.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

Menace
{1}{B}, Exile another three cards from your graveyard: Return Determined Explorer from your graveyard to your hand.

Converge — Each creature gets -X/-X until end of turn, where X is the number of colors of mana spent to cast Enjoy the Silence.

Permanents you control are black. The same is true for spells you control and nonland cards you own that aren't on the battlefield.
At the beginning of your upkeep, you may pay {B}. If you do, you draw a card and you lose 1 life.

This spell costs {3} less to cast if it targets a creature with mana value 2 or less.
Destroy target creature.

Target player mills two cards. You draw a card and you lose 1 life.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

Whenever an opponent activates an ability of a nonland permanent, destroy that permanent.
{3}{U}{B}{R}: Exile target creature or planeswalker card in a graveyard. Create a token that's a copy of it.

Flash
This spell costs {1} less to cast for each creature that left the battlefield this turn.

Destroy target creature or planeswalker.

Enchant creature
Enchanted creature gets +2/+0.
{2}{B}, Exile Hold Me Down from your graveyard: Return target creature card from your graveyard to your hand.

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.

Destroy target Human creature.

Exile all creature cards from target player's graveyard. For each creature card exiled this way, search that player's library for any number of cards with the same name as that card and exile them. Then that player shuffles.

Menace
Augmented — Whenever you cast a spell, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Jaded Guardian. It loses this ability and gains “Whenever this creature attacks, defending player sacrifices two permanents.”

When Killdrone Engineer enters the battlefield, create a 1/1 colorless Servo artifact creature token.
Artifacts you control have deathtouch.