Behind the The One Ring placeholder/proxy is a Sequestered Stash.

Make room for:
Reckless Handling - Tutor

Need:
$$$ Portal to Phyrexia
$$ The Reaver Cleaver - Treasuresss
$ Treasure Vault
$$ Karn, Legacy Reforged
$$$ Roaming Throne - Double Chiss trigger
Demand Answers - Cheap card draw and artifact sac outlet

Consider:
Maze of Ith
Ingenuity Engine - Affinity-sink that can get me something else. And can be used both to save or re-use another artifact and as a sac outlet
Threefold Thunderhulk - Myr Battlesphere at home
*** Mirrorworks - Copy cool artifacts, but where the hell is it?
** Goblin Welder - I definitely want this, but it's currently being used in Breya
** Goblin Engineer - Probably want this for both effects, but currently in Zndrsplt casual
* Scroll Rack - Put the good stuff on top for Chiss trigger. Does Narset have the only copy?
* Ichor Wellspring - Cheap artifact that cantrips and then draws another when I sac for value
Chain Reaction - Sweeper
Vandalblast - Just a great, flexible red card
Seize the Spoils - Card draw, feeding graveyard for weld effects, and make treasures. But Wort has the only(?) copy
Pirate's Pillage - Card draw, treasure generation
Lithoform Engine - Copy Chiss trigger, or just copy a juicy artifact spell
Mycosynth Wellspring - Artifact that finds us a land and then can be sac fodder
Helm + Godo - Helm on Chiss would be sweet anyway, and including Godo just for the game ender is a relatively low cost
Platinum Angel - Big artifact worth discounting or cheating in
Sigil of Distinction - Affinity-sink that can make Chiss quickly lethal
Feldon of the Third Path - Get back Reckless Fireweaver etc
Thran Dynamo - Nice mana rock
Unwinding Clock - Nice effect, but Breya needs it more
Extraplanar Lens - Mana doubler
Coldsteel Heart - Cheap mana rock
Commander's Sphere - Rock that can cycle
Sojourner's Companion - Affinity dude that can also help me get there
Walking Ballista - Affinity-sink, but it seems unlikely that I will be able to discount it enough to make it relevant
Soul-Guide Lantern - Cheap artifact with utility that can cycle in the worst case
Ugin, the Ineffable - Discount artifacts, get bodies and cards
Koth, Fire of Resistance - Find lands or kill something. Ult is a better Valakut
Tibalt's Trickery
Skyclave Relic - Indestructible mana rock(s)
Astral Cornucopia
Hellkite Igniter - This can be a BIG chonker, but it can't be discounted
Krark-Clan Ironworks - Sac outlet and "ramp"
Trading Post - Does a lot of small things inefficiently
Urza's Saga
Inspiring Statuary - With a lot of artifacts, this can add tons of mana, but it can only be used for non-artifacts

Consider (probably have):
Slagstone Refinery - Get mana rocks when my stuff gets removed (or sacced voluntarily)
Servo Schematic - 2 artifacts for 2, and a third when it leaves

Consider (don't have):
$ Mithril Coat - Protect Chiss in response to removal
$$ Darksteel Monolith - Allows me to cast the big stuff that gets stuck in my hand
$ Triplicate Titan - Win con that pays for Commander tax after a sweeper
Tsabo's Web
$$ Passionate Archaeologist
$ Endless Atlas - Cheap artifact that draws cards
Clown Car - Affinity-sink that can give a large board presence that further increases affinity
Hexplate Wallbreaker - Extra combat equipment
Wondrous Crucible - Affinity pay-off that protects my stuff and gives me continuous advantage
Visions of Ruin - Artifact removal that can discount Chiss later
Lizard Blades - Cheap equipment that can discount Chiss then make it scary later
Ruin Grinder - Artifact that can refill hand
$$ Goldspan Dragon

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Considered cuts:
Inspired Tinkering - Expensive draw that doesn't let me keep the cards for later and doesn't fuel the yard
Burnished Hart - Slow
Beamtown Beatstick
Jhoira's Familiar - Expensive for a discounter
Hangarback Walker - Hard to discount it enough to be relevant? The piñata effect is nice for recasting Chiss after a sweeper though

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Cuts:
? Treasure Map - Since I can't find it, and it's pretty slow anyway
Su-Chi Cave Guard - Basically unplayable without solid discounting
Chimeric Mass - Affinity-sink that gives me a huge (non-evasive) creature that survives sweepers
Saheeli's Directive - Can't discount like I can with artifacts