How do I reach the Night Market boss without the relic?

I can’t give a reliable route from those details alone, and I wouldn’t assume that seeing other players at the boss means your route is open. Check the shard clues or objective marker for the next step, then retrace the path from the last area you can reach. If the relic is listed as a requirement, focus on finding the missing splinter first. A precise route would need more detail about where you’re getting stuck.