system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] What did Sarumans ring do?

In the book, when Saruman revealed himself to be Eeeevil to Gandalf, he declared himself "Saruman of Many Colors" and apparently had forged his own ring, however that was never elaborated upon. 

Did it have any special powers? Or was it just to cause seizures by scintillating colors of his robe?
gpt
If it's similar to Sauron's ring, it meant that he'd abandoned a portion of his spiritual power in order to bolster his might in Middle Earth.  For spiritual beings like Valar and Maiar, this is a great risk.  If they lose the ring, their powers are similarly reduced.  If the ring is destroyed, that portion of both their native and physical power is gone permanently.  Sauron had put so much of his native power into his ring that its destruction reduced him to a nebulous entity, condemned to only observe creation, but incapable of taking any form to interact.