When this Subroutine enters, you create two 1/1 black Jellyfish enchantment creature tokens with flying, draw two cards, and gain 2 life.
Whenever this Subroutine leaves the battlefield or runs, you sacrifice a creature, discard a card, and lose 1 life.

Level up {3}{B}
[level 1-3] Menace
[level 4+] Menace

When Barbarous Roughrider enters or leaves the battlefield, each opponent loses 2 life unless they sacrifice a nontoken creature.
Wander {4}{B}{B}

When Beckoner of Ends enters, target player discards a card. Integrate that card.
Beckoner of Ends has deathtouch as long as a land card is integrated onto it.

Beloved Poppet can't be blocked by creatures with power 4 or greater.
Surface {4}{B}. This spell costs {3} less to cast if Beloved Poppet died this turn. Beloved Poppet surfaces transformed.

When Blackout Grifter enters, each opponent loses 1 life and you gain 1 life.
Cybersoul {3}{B}

Lifelink
{1}{B}, {T}, Sacrifice a creature: Target opponent discards a card. Activate only as a sorcery.
{2}{B}, {T}, Exile a creature card from your graveyard: You draw a card and you lose 1 life. Activate only as a sorcery.

Flash
When Blightfang Zyxthax enters, discard a card. If you do, it gains deathtouch until end of turn.

Flying
When Blue Collar Bloodsucker enters, you gain 2 life. Then if you control a red permanent, Blue Collar Bloodsucker deals 2 damage to each opponent.

At the beginning of your end step, if a creature card or creature token was put into your graveyard from anywhere this turn, surveil 1.

This spell costs {1} less to cast for each creature and/or enchantment card in your graveyard.
Ward—Discard a card.

Flying
Whenever Capital Skyraiders deals combat damage to a player, integrate the top card of that player's library.
Capital Skyraiders gets +3/+3 as long as four or more cards are integrated onto it.

Corrupt — When this creature enters, mill three cards. If you control a permanent with greater mana value than this creature, you may cache a creature card from your graveyard.

When this creature dies, create a black Subroutine enchantment token named TICK with “Whenever this Subroutine runs, each opponent loses 1 life and you gain 1 life.”
{1}{B}: Return this card from your graveyard to the battlefield tapped. Activate only if a card left your graveyard this turn.

Target opponent loses 3 life unless they discard a nonland card, then loses 3 life unless they sacrifice a nonland permanent. You gain life equal to the amount of life lost this way.

At the beginning of your end step, for each opponent with an even number of cards in hand, they lose 3 life and you gain 3 life.
[+1]: Target player draws a card and loses 1 life.
[–4]: Target opponent exiles one or more cards from their hand. Then you may have that player exchange their hand and the exiled cards.

Choose up to X, where X is one plus the number of creatures you control with level counters on them.
• Each opponent discards two cards.
• Creatures your opponents control get -1/-1 until end of turn.
• Each opponent loses 3 life and you gain 3 life.

You may cast this spell without paying its mana cost if your devotion to black is four or greater.
Deathtouch
Whenever Chrolcatos deals combat damage to player, you draw a card and you lose 1 life.

Choose one. If this spell's flashback cost was paid, instead choose three and you may choose the same mode more than once.
• Target player sacrifices a creature and a planeswalker.
• Target player discards two cards, then exiles their graveyard.
• All creatures get -2/-2 until end of turn.
Flashback {7}{B}{B}

Whenever you cast a spell from your graveyard, each opponent loses 1 life and you gain 1 life.
Surface {3}{B}{B}. Chum Chaser surfaces transformed.

Destroy target creature if it has power 3 or less or if you control a creature with flying.

When Codename: Ant dies, you may search your library for a card named Codename: Ant, reveal it, put it into your hand, then shuffle.

Choose one —
• Target creature gets +2/+0 and gains indestructible until end of turn.
• Target player sacrifices a creature.

Whenever an opponent loses life for the first time each turn, they lose 3 life.
Whenever an opponent discards a card for the first time each turn, they discard a card.
Whenever an opponent sacrifices a permanent for the first time each turn, they sacrifice a nonland permanent.

Whenever a creature you control deals combat damage to a player, you may sacrifice it. If you do, draw a card. Otherwise, surveil 1.