Mindslaver

Contagion Engine

Artifact

When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls.
, : Proliferate, then proliferate again. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)

Myr Battlesphere

Artifact Creature — Myr Construct (4/7)

When Myr Battlesphere enters the battlefield, create four 1/1 colorless Myr artifact creature tokens.
Whenever Myr Battlesphere attacks, you may tap X untapped Myr you control. If you do, Myr Battlesphere gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.

Darksteel Juggernaut

Artifact Creature — Juggernaut (0/0)

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

Precursor Golem

Artifact Creature — Golem (3/3)

When Precursor Golem enters the battlefield, create two 3/3 colorless Golem artifact creature tokens.
Whenever a player casts an instant or sorcery spell that targets only a single Golem, that player copies that spell for each other Golem that spell could target. Each copy targets a different one of those Golems.

Argentum Armor

Artifact — Equipment

Equipped creature gets +6/+6.
Whenever equipped creature attacks, destroy target permanent.
Equip

Golem Artisan

Artifact Creature — Golem (3/3)

: Target artifact creature gets +1/+1 until end of turn.
: Target artifact creature gains your choice of flying, trample, or haste until end of turn.

Kuldotha Forgemaster

Artifact Creature — Construct (3/5)

, Sacrifice three artifacts: Search your library for an artifact card, put it onto the battlefield, then shuffle.

Clone Shell

Artifact Creature — Shapeshifter (2/2)

Imprint — When Clone Shell enters the battlefield, look at the top four cards of your library, exile one face down, then put the rest on the bottom of your library in any order.
When Clone Shell dies, turn the exiled card face up. If it's a creature card, put it onto the battlefield under your control.

Steel Hellkite

Artifact Creature — Dragon (5/5)

Flying
: Steel Hellkite gets +1/+0 until end of turn.
: Destroy each nonland permanent with mana value X whose controller was dealt combat damage by Steel Hellkite this turn. Activate only once each turn.

Darksteel Sentinel

Artifact Creature — Golem (3/3)

Flash (You may cast this spell any time you could cast an instant.)
Vigilance
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.)

Razorfield Thresher

Artifact Creature — Construct (6/4)

Saberclaw Golem

Artifact Creature — Golem (4/2)

: Saberclaw Golem gains first strike until end of turn.

Soliton

Artifact Creature — Construct (3/4)

: Untap Soliton.

Trigon of Thought

Artifact

Trigon of Thought enters the battlefield with three charge counters on it.
, : Put a charge counter on Trigon of Thought.
, , Remove a charge counter from Trigon of Thought: Draw a card.

Venser's Journal

Artifact

You have no maximum hand size.
At the beginning of your upkeep, you gain 1 life for each card in your hand.

Wurmcoil Engine

Artifact Creature — Phyrexian Wurm (6/6)

Deathtouch, lifelink
When Wurmcoil Engine dies, create a 3/3 colorless Phyrexian Wurm artifact creature token with deathtouch and a 3/3 colorless Phyrexian Wurm artifact creature token with lifelink.

Nihil Spellbomb

Artifact

, Sacrifice Nihil Spellbomb: Exile target player's graveyard.
When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay . If you do, draw a card.

Accorder's Shield

Artifact — Equipment

Equipped creature gets +0/+3 and has vigilance. (Attacking doesn't cause it to tap.)
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Strider Harness

Artifact — Equipment

Equipped creature gets +1/+1 and has haste.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Vulshok Replica

Artifact Creature — Berserker (3/1)

, Sacrifice Vulshok Replica: It deals 3 damage to target player or planeswalker.