The Cleanse Walker is your mobile base in Beast of Reincarnation, which is essential to upgrade because many game systems are locked behind its Bauera Levels, such as weapon levels. This guide will provide you with tips and tricks on how to upgrade the Cleanse Walker in the game. How to Find the Upgrade ItemsThe most important upgrade items for your Cleanse Walker are the Generator Device and Electronic Brain, which look like skulls of different colors. Here’s how to upgrade your systems:Return to the Cleanse Walker via fast travel. You can track your progress via Bauera’s Abilities bar at the bottom-right corner while inside the Cleanse Walker.