This is a slight variation on NKL's list from earlier this year. It began when I added Melinoe to the list, which I really really like. Melinoe is a star when you can shroud, racer every turn. It's not uncommon to get three forlorn spirits in one turn, which can then be used to find cards via Bull or Pseudonomicon. Steam Bun also is underutilized with Shroud, at the moment. If Bull is out, it is in essence drawing 2 cards.
An argument can be made to -1 Extract life + 1 Terragon. Terragon on turn 3 is so good with Bell. And the overrun pearl is great with forgelings. I also really like Blood Moon in this deck. Getting three red gems is difficult and so other card draw options, are less viable. With shroud/racers, it is easy to use blood moon to draw 2 cards in a turn, and gain a bit of life. It also can be crazy good the turn after 7rr.
This is another artifact deck that is preforming really well on ladder to all things not Necro. Necro's win percentage is >80%. Everything else, I think it is favored against.