system
Given the following post, respond as if you're commenting on Reddit:
human
[D&D]Every 289 the Modrons, a race of sentient golem-people from the elemental plane of Law, Mechanus, march across the cosmos in a great march, looking for something and killing anything that gets in their way. What are some theories on what they are looking for?
gpt
They're still looking for Orcus's wand from back when he killed and stole the then Primus's identity. Due to the large stratified clockwork-like bureaucratic nightmare that is the Modron society, orders don't get handed down very quickly, and organizing events can take anywhere from decades to centuries. 

So it takes 289 years for a section of Modrons to finish organizing and set off on the March, sometimes one section does it quicker though.