msem-instigator

Counter up to one target spell unless its controller pays {2}. Until end of turn, you may cast spells as though they had flash.

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.

As an additional cost to cast this spell, sacrifice a creature.
Destroy target creature.

Each player sacrifices a 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.)

As an additional cost to cast this spell, you may pay {2} and tap an untapped Rogue you control. When you do, copy this spell and you may choose new targets for the copy.
Target creature gets -2/-2 until end of turn.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Cycling {B} ({B}, Discard this card: Draw a card.)

When Hail to the Queen enters the battlefield, each player sacrifices a creature.
Whenever a nontoken creature you control dies, you may pay its mana cost. If you do, create a token that's a copy of it.

Whenever one or more Rogues you control attack, you may pay 1 life. If you do, draw a card.

Search your library for a Demon card or a black card with mana value 6 or greater, reveal it, put that card in your hand, then shuffle.

Flying
Whenever an opponent discards a card, you may exile it. If you do, create a 1/1 black Bird creature token with flying and “This creature can't block.”
{B}, Sacrifice three Birds: You may cast a card exiled with Krahen, Dusk's Call without paying its mana cost.

Deathtouch
Vanishing 4 (This permanent enters the battlefield with four time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
Lifelink
Demon spells you cast cost {B} less to cast and an additional 2 life to cast.
{3}{B/R}{B/R}: Demon
Discard your hand. Draw a number of cards equal to the greatest power among Demons you control.
{5}{U/B}{U/B}: Noble
Gain control of target creature. You lose life equal to its mana value.

When Maven of Fear enters the battlefield, mill two cards.
Maven of Fear gets +2/+1 and has menace as long as six or more cards are in your graveyard.

Poisonous 1 (Whenever this creature deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)
At the beginning of your upkeep, if an opponent is poisoned, you draw a card, you lose 1 life, and you get a poison counter.

Destroy target creature. Recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

Whenever an opponent discards a card, exile it. You may cast that card as long for as it remains exiled, and you may spend black mana as though it were mana of any color to cast that spell.

Whenever you cast a black spell, choose up to X, where X is the number of black mana symbols in that spell's mana cost —
• Target player loses 1 life and you gain 1 life.
• Put a -1/-1 counter on target creature.
• You draw a card and you lose 3 life.
• Exile target card in a graveyard.

Target opponent reveals their hand. You choose a nonland card from it. If you can't, they discard a card. Otherwise, that player discards a card, then if they didn't discard the chosen card, you create a tapped Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Choose one —
• Target creature gets +1/+1 and gains lifelink until end of turn.
• Target creature gets -2/-2 until end of turn.
• Scry 1, then draw a card.

Return target creature card from your graveyard to the battlefield, then destroy target creature an opponent controls that doesn't share a creature type with it.

Target player gets a poison counter.
Draw a card.

When Treacherous Warden enters the battlefield, search your library for a card, put into your graveyard, then shuffle.
Whenever a creature enters the battlefield from your graveyard, each opponent loses 2 life and you gain 2 life.

Flying
If Warden of Distortion would die, you may exile a creature card from your graveyard. If you do, Warden of Distortion becomes a copy of that creature, except it's a 4/4 Nightmare Dragon and it has flying and this ability. It gains indestructible until end of turn.

This spell costs {2} less to cast if it targets a creature or planeswalker card with mana value 3 or less.
Return target creature or planeswalker card from your graveyard to the battlefield.