Dimir (Blue/Black): Artifact Control Artifacts are a huge part of Edge of Eternities , and Dimir (UB) leans into that with a strong control-based archetype
Rattlechains Its hard to rank typal enablers, but Rattlechains is an absolutely key card in spirits decks, protecting and then enabling flash for 2 mana
Its narrow use makes it one of the least useful of the bunch, and there are easier ways to put +1/+1s on creatures and ramp at the same time, like Gyre Sage
Yes, its expensive, but it turns the tide and sets you up to win in spectacular fashion
that doesnt mean I think its bad or that youre bad for playing them, and to be clear, this is for casual EDH only
3: Search your library for an artifact card with mana value 1 or less, reveal it, put it into your hand, then shuffle