Noncreature Artifact with MV<=1 in your graveyard.
All other permanents on the battlefield (
Artist's Talent is at least level 2).
Easy Prerequisites
You have not cast an artifact spell using
Muldrotha this turn.
Steps
Cast the artifact from your graveyard by paying ({0} magic symbol) .
Displacer Kitten triggers, blinking
Muldrotha.
When the artifact enters,
Grinding Station triggers, untapping
Grinding Station.
Activate
Grinding Station by tapping it and sacrificing the artifact.
Repeat.
Notes
If the chosen artifact can tap to provide additional effects, you will also gain infinite amounts of those effects. For example, Sol Ring will give infinite colorless mana, and Codex Shredder will provide infinite mill and self-mill.