Atraxa's Skitterfang enters the battlefield with three oil counters on it. At the beginning of combat on your turn, you may remove an oil counter from Atraxa's Skitterfang. When you do, target creature you control gains your choice of flying, vigilance, deathtouch, or lifelink until end of turn.

Lifelink, haste

Sacrifice another Phyrexian: Put a +1/+1 counter on Bloated Processor. When Bloated Processor dies, incubate X, where X is its power. (Create an Incubator token with X +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Carrion Grub gets +X/+0, where X is the greatest power among creature cards in your graveyard. When Carrion Grub enters the battlefield, mill four cards. (Put the top four cards of your library into your graveyard.)

As Coalition Construct enters the battlefield, choose a creature type. Coalition Construct is the chosen type in addition to its other types. When Coalition Construct enters the battlefield, other creatures you control of the chosen type and creature cards of that type in your hand perpetually get +1/+1.

Backup 1 (When this creature enters the battlefield, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.) Lifelink

When Deathknell Berserker dies, if its power was 3 or greater, create a 2/2 black Zombie Berserker creature token.

When Etched Familiar dies, each opponent loses 2 life and you gain 2 life.

Changeling When Faceless Agent enters the battlefield, seek a creature card of the most prevalent creature type in your library.

Prototype {2}{B} — 3/2 At the beginning of your upkeep, return target creature card with power less than Forgefire Automaton's power from your graveyard to the battlefield. Its base power perpetually becomes equal to Forgefire Automaton's power.

Deathtouch, lifelink

Whenever a creature deals combat damage to one of your opponents, its controller may pay 1 life. If they do, they draw a card. {4}{B}{B}{B}, Discard X cards: Exile the top X cards of target opponent's library. You may play lands and cast spells from among cards exiled this way without paying their mana costs.

Swampcycling {2} ({2}, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.) Backup 2 (When this creature enters the battlefield, put two +1/+1 counters on target creature. If that's another creature, it gains the following ability until end of turn.) Menace

Deathtouch When Guildsworn Prowler dies, if it wasn't blocking, draw a card.

When Meteor Golem enters the battlefield, destroy target nonland permanent an opponent controls.

When Papercraft Decoy leaves the battlefield, you may pay {2}. If you do, draw a card.

{2}{B}: Return Persistent Specimen from your graveyard to the battlefield tapped.

Backup 1 (When this creature enters the battlefield, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.) {1}, Sacrifice this creature: Draw a card.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) Lifelink (Damage dealt by this creature also causes you to gain that much life.)

({B/P} can be paid with either {B} or 2 life.) Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Changeling (This card is every creature type.) Deathtouch

Exile target creature. Incubate 3. (Create an Incubator token with three +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Destroy target creature or planeswalker. Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

({T}: Add {B}.)

{T}: Add {B}. Channel — {3}{B}, Discard Takenuma, Abandoned Mire: Mill three cards, then return a creature or planeswalker card from your graveyard to your hand. This ability costs {1} less to activate for each legendary creature you control.

As an additional cost to cast this spell, pay {4} or sacrifice an artifact or creature. Destroy target creature or planeswalker.