Menace
Cybersoul {3}{B}

At the beginning of each player's upkeep, that player discards a card or sacrifices a nontoken, nonland permanent. Integrate that card.
When Tithe to the Machine leaves the battlefield, create a 2/2 black Zombie artifact creature token for each card type among cards integrated onto it.

Whenever Steelhorn Crusher or another artifact you control enters, artifact creatures you control gain menace until end of turn.

{3}: Integrate the top two cards of target player's library.
As long as six or more cards are integrated onto permanents you control, Silverbone Chromate gets +2/+3 and has menace.

Enchant creature
Enchanted creature gets -1/-1.
Sacrifice an artifact: Destroy enchanted creature.

Flying
Whenever Synthetic Specter deals combat damage to a player, that player discards a card. Then if they have no cards in hand, put a +1/+1 counter on Synthetic Specter.

Whenever Rooftop Slink deals combat damage to a player, you may have each player discard a card.
Cybersoul {2}{B}

Reach
Replicrawler gets +1/+1 for each other artifact creature you control.
If you would create a token, you may pay {B}. If you do, create a token that's a copy of Replicrawler instead.

This spell costs {1} less to cast for each card in exile you don't own.
Trample
Ward—Exile a nonland, nontoken permanent you control.

Reach, lifelink

Flying, trample, lifelink
Ward—Pay 7 life.

Flying
When Malicious Skycleaver enters, pay any amount of life. It deals that much damage to each other creature.
Cybersoul {7}{B}{B}

Draw two cards. If you don't control an artifact creature, you lose 3 life.

Integrate the top two cards of target player's library. They lose 2 life, and you gain 2 life.
Whenever a permanent you control with two or more cards integrated onto it dies, you may pay {B}. If you do, return Lure into Lunacy from your graveyard to your hand.

At the beginning of your end step, each player mills two cards. Then if it's your first turn of the game or you discarded a card named Leystone of Ruin this turn, target player mills four cards.
Cycling {B}

Target player exiles a creature they control and the top card of their library. When they exile cards this way, pay for and choose any number.
+{B} — Each player exiles a card from their hand.
+{W} — Exile any player's graveyard. You gain 1 life for each card type among cards exiled this turn.
+{C} — Copy a card exiled this turn with mana value 3 or less. You may cast the copy without paying its mana cost. If you do, discard a card.

Whenever Reborn Apostle attacks, each player loses 1 life.

When Iris Cultist enters, you lose 1 life.
Cybersoul {4}{B}

Deathtouch
When this creature transforms into Iris Flayer, target player draws a card and loses 1 life.

Deathtouch
Cybersoul {4}{B}

Whenever Inner Ring's Pupil enters or attacks, target player discards a card. If they can't, they sacrifice a creature. If they can't, they lose 7 life.

Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.
{B}{B}, Exile Gilded Death and six other cards from your graveyard: Create a tapped token that's a copy of Gilded Death.

Whenever a creature dealt damage by Fleshbearer this turn dies, integrate that creature.
Fleshbearer gets +2/+0 and has menace as long as a creature card is integrated onto it.

Mill X cards. For each land card milled this way, add {B}{B}. For each creature card milled this way, create a 2/2 black Zombie artifact creature token. For each noncreature, nonland card milled this way, draw a card.

Feed on the Meek deals 4 damage to target creature. Put X +1/+1 counters on up to one target creature, where X is the amount of excess damage dealt to that creature this way.