If you want to take a look at the full set, theres a full visual spoiler on the Wizards of the Coast site
If you do, create a 2/2 colorless Robot artifact creature token that's tapped and attacking
If Atarka is also in play, a devastating attack can be made with Double Strike
There are also two indirect ways to bypass the legend rule: creating a copy of a legendary creature under a different name (Lazav, Dimir Mastermind) and creating a copy of a legendary creature that isnt legendary (Helm of the Host)
It means you can comfortably keep attacking in as long as youre being fair, and if youre making counters in literally any other way, then youre golden
This emulates a Usher of the Fallen riff, but since the robot isnt permanent, its activated ability is mostly there for the later stages of the game to extract value out your early game threats into the late game and get an artifact out there if needed