msem-instigator

When Street Performer enters the battlefield, create a 2/1 blue Illusion creature token with “When this creature becomes the target of a spell or ability, sacrifice it.”

Choose a permanent type. Permanents you control of that type gain hexproof until end of turn.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, permanents you control gain hexproof until end of turn instead.

Counter target spell unless its controller pays {X}. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Look at target player's hand. Draw two cards, then discard a card.

You may cast Elemental spells as though they had flash this turn.
Whenever you cast an Elemental spell this turn, draw a card.

When Abyssal Nightcaster enters the battlefield, each player exiles a card from their hand.
When Abyssal Nightcaster dies, you may play cards you don't own from exile this turn.

When Alenian Cruel-Star enters the battlefield, put a +1/+1 counter on it if you control another Goblin.

If a creature would leave the battlefield this turn, exile it instead.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, target player sacrifices a creature.

Sacrifice another creature: Blood Bairn gets +2/+2 until end of turn.

{1}{B}, Sacrifice another creature, Discard two cards: Search your library for a card, put that card into your hand, then shuffle.

Deathwind Survivor's power and toughness are each equal to the number of enchantments you control.
Whenever an enchantment enters the battlefield under your control, put a +1/+1 counter on target creature.

Target creature gets -2/-2 until end of turn.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, return up to one target enchantment card from your graveyard to your hand.

As an additional cost to cast this spell, discard a nonland card.
Target player reveals their hand. You choose a nonland card from it. That player discards that card.

When Delusive Shadows enters the battlefield, each opponent loses life equal to the number of cards that player owns in exile.

Menace
Whenever Despair Scavenger attacks, you may have target creature get -1/-1 until end of turn.

Drakon Nightshade can't block.
When Drakon Nightshade dies, scry 1.

Whenever a nontoken creature you control dies, you may put a +1/+1 counter on target creature. If you do, that creature's controller loses 1 life.

Menace
Evanescent Soulcatcher's power and toughness are each equal to the number of cards in exile.
{2}, Exile a card from your hand: Regenerate Evanescent Soulcatcher.

Menace
When Fortune Hoarder dies, each player discards a card at random.

Menace
When Icilica's Icestrider enters the battlefield, choose one —
• Draw a card if you own a card in exile.
• Target player discards a card if that player owns a card in exile.

When Infested Goblin dies, choose target creature. At the beginning of your next upkeep, that creature's controller sacrifices it.

Menace, lifelink
Whenever Jonah of the Spellbane deals combat damage to a player, destroy target creature or planeswalker, then scry 1.

Exile target nonblack creature. Its controller exiles a card at random from their hand.

Whenever a nontoken creature you control dies, you may pay that creature's mana cost. If you do, search your library for a card and put it into your hand, then shuffle.