: Target artifact creature's controller sacrifices it. That player may search their library for a noncreature artifact card, put it onto the battlefield, then shuffle.
Use Arcum's tap ability to sacrifice cheap artifact creatures and tutor powerful noncreature artifacts directly onto the battlefield, chaining toward a game-ending combo. You ramp with mana rocks, deploy expendable artifact creatures, and untap Arcum repeatedly to assemble engines or kill the table in a single turn cycle. Protect Arcum and go off, since the deck is largely a dedicated combo machine.
Repeatable, on-command tutoring that puts artifacts onto the battlefield untapped, bypassing mana costs
Mono-blue gives full access to counterspells and interaction to protect the combo
Can assemble multiple infinite loops, making it resilient with many redundant kill paths
Cheap artifact creatures double as ramp, fodder, and combo fuel
Arcum is a fragile 1/1 that telegraphs intent and is a magnet for removal
Tutors only your own artifact creatures, so you must keep fresh fodder available
Generates fresh artifact creature tokens each turn to feed Arcum repeatedly.
Add fast mana (Mana Vault, Grim Monolith, Mana Crypt) and more untappers to enable explosive turns, plus the best blue tutors (Mystical Tutor, Fabricate, Whir of Invention) to find combo pieces. Tighten the combo package around compact infinite loops and back it with premium counterspells (Force of Will, Mana Drain, Pact of Negation) to protect Arcum. Replace clunky high-cost artifacts with lean, redundant pieces so you can win earlier and survive removal.
Legendary Creature — Human Artificer
: Target artifact creature's controller sacrifices it. That player may search their library for a noncreature artifact card, put it onto the battlefield, then shuffle.