If you want more healing items without having to pay a fortune every time you need a Potion, you should collect the Stellar Blade Tumbler Expansion Modules.
Stellar Blade walkthrough – All tumbler expansion modules – Perfect rechargeable tumbler trophy
Healing isn’t always guaranteed in Stellar Blade, and progression will slow down if you don’t have enough money to replenish lost Potions. You probably won’t make it to the next boss fight in time if you keep visiting the Supply Camp to recharge your Tumbler. Instead, it’s best to get as many Tumbler Expansion Modules as possible.
Expansion Modules are incredibly rare to find as they do not appear in chests or coded containers, and they also cannot be picked up as loot from defeating enemies and bosses. Instead, the Tumbler Expansion Module is only dropped by the harmless and slightly petrified Robot.
Robots spawn in every Stellar Blade location, but in limited numbers. Always take the time to explore each area for rare materials, including occasional Robot spawns. Luckily, these Robots have fixed spawns and won't disappear if you miss them.
