Modular 3 (This creature enters the battlefield with three +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Trample Whenever another artifact enters the battlefield, put a +1/+1 counter on Arcbound Crusher. Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) At the beginning of your upkeep, you may move a +1/+1 counter from target creature onto Arcbound Fiend. Modular 3 (This creature enters the battlefield with three +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Haste Modular 2 (This creature enters the battlefield with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

{T}, Remove X +1/+1 counters from Arcbound Javelineer: It deals X damage to target attacking or blocking creature. Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

First strike Modular 4 (This creature enters the battlefield with four +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Lifelink Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

At the beginning of your upkeep, put a +1/+1 counter on each creature with modular you control. Modular 6 (This creature enters the battlefield with six +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Modular 2 (This creature enters the battlefield with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Remove a +1/+1 counter from Arcbound Reclaimer: Put target artifact card from your graveyard on top of your library. Modular 2 (This creature enters the battlefield with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Whenever Arcbound Slith deals combat damage to a player, put a +1/+1 counter on it. Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Flying Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Indestructible When Barbed Servitor enters the battlefield, suspect it. (It has menace and can't block.) Whenever Barbed Servitor deals combat damage to a player, you draw a card and you lose 1 life. Whenever Barbed Servitor is dealt damage, target opponent loses that much life.

Court Homunculus gets +1/+1 as long as you control another artifact.

Defender {T}: Creatures you control gain haste until end of turn.

Indestructible Whenever Creepy Doll deals combat damage to a creature, flip a coin. If you win the flip, destroy that creature.

Indestructible Darksteel Juggernaut's power and toughness are each equal to the number of artifacts you control. Darksteel Juggernaut attacks each combat if able.

Indestructible (Damage and effects that say "destroy" don't destroy this creature. If its toughness is 0 or less, it's still put into its owner's graveyard.)

When Electrostatic Pummeler enters the battlefield, you get {E}{E}{E} (three energy counters). Pay {E}{E}{E}: Electrostatic Pummeler gets +X/+X until end of turn, where X is its power.

Epochrasite enters the battlefield with three +1/+1 counters on it if you didn't cast it from your hand. When Epochrasite dies, exile it with three time counters on it and it gains suspend. (At the beginning of its owner's upkeep, they remove a time counter. When the last is removed, they may cast this card without paying its mana cost. It has haste.)

When Filigree Vector enters the battlefield, put a +1/+1 counter on each of any number of target creatures and a charge counter on each of any number of target artifacts. {1}, {T}, Sacrifice another artifact: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Hangarback Walker enters the battlefield with X +1/+1 counters on it. When Hangarback Walker dies, create a 1/1 colorless Thopter artifact creature token with flying for each +1/+1 counter on Hangarback Walker. {1}, {T}: Put a +1/+1 counter on Hangarback Walker.

Flying Hexavus enters the battlefield with six +1/+1 counters on it. {1}, Remove a +1/+1 counter from Hexavus: Put a flying counter on another target creature. {1}, Remove a counter from another creature you control: Put a +1/+1 counter on Hexavus.

Iron Apprentice enters the battlefield with a +1/+1 counter on it. When Iron Apprentice dies, if it had counters on it, put those counters on target creature you control.

{W}: Exile target card from a graveyard. If it was a permanent card, put a +1/+1 counter on Lion Sash. Equipped creature gets +1/+1 for each +1/+1 counter on Lion Sash. Reconfigure {2} ({2}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Mindless Automaton enters the battlefield with two +1/+1 counters on it. {1}, Discard a card: Put a +1/+1 counter on Mindless Automaton. Remove two +1/+1 counters from Mindless Automaton: Draw a card.

Flying

Flying {T}: Add one mana of any color.

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.) Whenever you cast an artifact spell, put a +1/+1 counter on Patchwork Automaton.

Pentavus enters the battlefield with five +1/+1 counters on it. {1}, Remove a +1/+1 counter from Pentavus: Create a 1/1 colorless Pentavite artifact creature token with flying. {1}, Sacrifice a Pentavite: Put a +1/+1 counter on Pentavus.

Flying Harbinger of Despair — Whenever Psychomancer or another nontoken artifact you control is put into a graveyard from the battlefield or is put into exile from the battlefield, target opponent loses 1 life and you gain 1 life.

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.) Signal Pest can't be blocked except by creatures with flying or reach.

Protection from multicolored (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything multicolored.) Whenever a nonbasic land enters the battlefield under an opponent's control, you gain 1 life.

{T}: Put a +1/+1 counter on each artifact creature you control.