After you defeat Solus Wing in Risk of Rain 2: Alloyed Collective, it will drop an Encrypted Cerebellum. This is a very important item that you need to use if you want to take on the true final boss of the expansion. Here is what you can do with it.
Encrypted Cerebellum in Risk of Rain 2 Alloyed Collective
After finishing off Solus Wing, you’ll receive the Encrypted Cerebellum item. This is used in combination with a few possible items to create a necessary item required to access the Hidden Realm: Neural Sanctum, where you’ll take on Solus Heart.
