If Blightsteel Colossus would be put into a graveyard from anywhere, reveal Blightsteel Colossus and shuffle it into its owner's library instead.
11 /
11
{3}
Brass Squire
Artifact Creature - Myr
{T}: Attach target Equipment you control to target creature you control.
1 /
3
{2}
Cranial Plating
Artifact - Equipment
Equipped creature gets +1/+0 for each artifact you control.
{B}{B}: Attach Cranial Plating to target creature you control.
Equip {1}
{2}{W}
Danitha Capashen, Paragon
Legendary Creature - Human Knight
First strike, vigilance, lifelink
Aura and Equipment spells you cast cost {1} less to cast.
2 /
2
--
Darksteel Citadel
Artifact Land
Indestructible
{T}: Add {C}.
{6}
Duplicant
Artifact Creature - Shapeshifter
Imprint -- When Duplicant enters the battlefield, you may exile target nontoken creature.
As long as a card exiled with Duplicant is a creature card, Duplicant has the power, toughness, and creature types of the last creature card exiled with Duplicant. It's still a Shapeshifter.
{T}: Another target creature you control gains protection from colorless or from the color of your choice until end of turn.
1 /
2
{3}
Golem Foundry
Artifact
Whenever you cast an artifact spell, you may put a charge counter on Golem Foundry.
Remove three charge counters from Golem Foundry: Create a 3/3 colorless Golem artifact creature token.
{2}
Ichor Wellspring
Artifact
When Ichor Wellspring enters the battlefield or is put into a graveyard from the battlefield, draw a card.
--
Inventors' Fair
Legendary Land
At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life.
{T}: Add {C}.
{4}, {T}, Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.
{4}
Jhoira's Familiar
Artifact Creature - Bird
Flying
Historic spells you cast cost {1} less to cast. (Artifacts, legendaries, and Sagas are historic.)
2 /
2
{7}
Karn Liberated
Legendary Planeswalker - Karn
+4: Target player exiles a card from their hand.
-3: Exile target permanent.
-14: Restart the game, leaving in exile all non-Aura permanent cards exiled with Karn Liberated. Then put those cards onto the battlefield under your control.
L:
6
{4}
Krark-Clan Ironworks
Artifact
Sacrifice an artifact: Add {C}{C}.
{5}
Kuldotha Forgemaster
Artifact Creature - Construct
{T}, Sacrifice three artifacts: Search your library for an artifact card, put it onto the battlefield, then shuffle.
3 /
5
{1}{W}
Leonin Shikari
Creature - Cat Soldier
You may activate equip abilities any time you could cast an instant.
2 /
2
{4}{B}{B}
Marionette Master
Creature - Human Artificer
Fabricate 3 (When this creature enters the battlefield, put three +1/+1 counters on it or create three 1/1 colorless Servo artifact creature tokens.)
Whenever an artifact you control is put into a graveyard from the battlefield, target opponent loses life equal to Marionette Master's power.
1 /
3
{11}
Metalwork Colossus
Artifact Creature - Construct
This spell costs {X} less to cast, where X is the total mana value of noncreature artifacts you control.
Sacrifice two artifacts: Return Metalwork Colossus from your graveyard to your hand.
10 /
10
{7}
Meteor Golem
Artifact Creature - Golem
When Meteor Golem enters, destroy target nonland permanent an opponent controls.
3 /
3
{6}
Mindslaver
Legendary Artifact
{4}, {T}, Sacrifice Mindslaver: You control target player during that player's next turn. (You see all cards that player could see and make all decisions for the player.)
{2}
Myr Retriever
Artifact Creature - Myr
When Myr Retriever dies, return another target artifact card from your graveyard to your hand.
1 /
1
{4}
Nevinyrral's Disk
Artifact
Nevinyrral's Disk enters the battlefield tapped.
{1}, {T}: Destroy all artifacts, creatures, and enchantments.
{1}
Nihil Spellbomb
Artifact
{T}, Sacrifice Nihil Spellbomb: Exile target player's graveyard.
When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.
--
Phyrexia's Core
Land
{T}: Add {C}.
{1}, {T}, Sacrifice an artifact: You gain 1 life.
{W}{W}
Puresteel Paladin
Creature - Human Knight
Whenever an Equipment enters the battlefield under your control, you may draw a card.
Metalcraft -- Equipment you control have equip {0} as long as you control three or more artifacts.
2 /
2
{1}{W}
Relic Seeker
Creature - Human Soldier
Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
When Relic Seeker becomes renowned, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle.
2 /
2
{3}
Scrap Trawler
Artifact Creature - Construct
Whenever Scrap Trawler or another artifact you control is put into a graveyard from the battlefield, return to your hand target artifact card in your graveyard with lesser mana value.
3 /
2
{3}
Scrapyard Recombiner
Artifact Creature - Construct
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}, Sacrifice an artifact: Search your library for a Construct card, reveal it, put it into your hand, then shuffle.
0 /
0
{3}
Shimmer Myr
Artifact Creature - Myr
Flash
You may cast artifact spells as though they had flash.
2 /
2
{6}
Steel Hellkite
Artifact Creature - Dragon
Flying
{2}: Steel Hellkite gets +1/+0 until end of turn.
{X}: Destroy each nonland permanent with mana value X whose controller was dealt combat damage by Steel Hellkite this turn. Activate only once each turn.
5 /
5
{1}{W}
Stone Haven Outfitter
Creature - Kor Artificer Ally
Equipped creatures you control get +1/+1.
Whenever an equipped creature you control dies, draw a card.
2 /
2
{3}{W}{W}
Stonehewer Giant
Creature - Giant Warrior
Vigilance
{1}{W}, {T}: Search your library for an Equipment card, put it onto the battlefield, attach it to a creature you control, then shuffle.
4 /
4
{3}
Sylvok Replica
Artifact Creature - Shaman
{G}, Sacrifice Sylvok Replica: Destroy target artifact or enchantment.
1 /
3
{4}
Trading Post
Artifact
{1}, {T}, Discard a card: You gain 4 life.
{1}, {T}, Pay 1 life: Create a 0/1 white Goat creature token.
{1}, {T}, Sacrifice a creature: Return target artifact card from your graveyard to your hand.
{1}, {T}, Sacrifice an artifact: Draw a card.
{6}
Ugin, the Ineffable
Legendary Planeswalker - Ugin
Colorless spells you cast cost {2} less to cast.
+1: Exile the top card of your library face down and look at it. Create a 2/2 colorless Spirit creature token. When that token leaves the battlefield, put the exiled card into your hand.
-3: Destroy target permanent that's one or more colors.
L:
4
{8}
Ugin, the Spirit Dragon
Legendary Planeswalker - Ugin
+2: Ugin, the Spirit Dragon deals 3 damage to any target.
-X: Exile each permanent with mana value X or less that's one or more colors.
-10: You gain 7 life, draw seven cards, then put up to seven permanent cards from your hand onto the battlefield.
L:
7
{4}{G}
Ich-Tekik, Salvage Splicer
Legendary Creature - Phyrexian Human Artificer
When Ich-Tekik, Salvage Splicer enters the battlefield, create a 3/3 colorless Phyrexian Golem artifact creature token.
Whenever an artifact is put into a graveyard from the battlefield, put a +1/+1 counter on Ich-Tekik and a +1/+1 counter on each Golem you control.
Partner (You can have two commanders if both have partner.)
1 /
1
{1}{W}{B}
Tymna the Weaver
Legendary Creature - Human Cleric
Lifelink
At the beginning of your postcombat main phase, you may pay X life, where X is the number of opponents that were dealt combat damage this turn. If you do, draw X cards.
Partner (You can have two commanders if both have partner.)