While an official "Nightreign Update" for Elden Ring doesn't exist, fans often use the term to discuss desired features or hypothetical DLC. If you're referring to a specific mod or fan-made update, please provide more context. However, if you're looking for information on legitimate Elden Ring patches, you can find official patch notes from FromSoftware on their website or through gaming news outlets. These patch notes detail bug fixes, balance adjustments, and occasionally, new content added to the game. Be sure to specify which update you're interested in to find the correct information.