msem-instigator

Other Goblins you control get +1/+0 and have menace.

At the beginning of your upkeep, you may sacrifice a Goblin. If you do, Alenian Boom Squad deals 2 damage to any target.

Haste
{R}: Akoum Rockhurler gets +1/+0 until end of turn.
Whenever Akoum Rockhurler attacks, you may sacrifice a land. If you do, put two +1/+1 counters on Akoum Rockhurler.

Enchant creature
Enchanted creature gets +1/+1 and has lifelink.
Sacrifice enchanted creature: Target creature gains lifelink until end of turn. Regenerate that creature. (The next time this permanent would be destroyed this turn, it isn't. Instead tap it.)

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
{1}{W}, Sacrifice a creature or enchantment: Scry 1, then draw a card. Activate only if Trauma Surgeon has a +1/+1 counter on it.

Choose target creature you control. When that creature dies this turn, each opponent loses 2 life and you gain 2 life. That creature gets +1/-1 until end of turn.

Lifelink
Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)

Enchant creature
Enchanted creature has deathtouch and “{1}{B}: Regenerate this creature.”

Destroy target creature. It can't be regenerated.

All creatures get -3/-3 until end of turn.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, if a creature would die this turn, exile it instead.

Destroy target creature or planeswalker. If you controlled a black legendary creature or planeswalker as you cast this spell, that permanent's controller loses X life and you gain X life, where X is that permanent's mana value.

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.

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

Menace
When Icilica's Icestrider enters, 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.

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

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.

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.

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

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

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

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.

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.

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

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

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