system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Can someone wield multiple Green Lantern rings at once?

If a user had sufficient willpower, could they wear a ring on each finger and be ten times as powerful as a normal Green Lantern?
gpt
When Hal went a bit cray-cray a few years ago, he wore green power rings on all his fingers. He didn't become more powerful by doing that, beyond maybe a placebo effect of him becoming more confident and therefore boosting his willpower a little while doing it. It was only when he absorbed the power of the central battery that he really jumped in power.

Wearing a power ring from each of the different corps is also possible (Karl Reyner did it), but apparently it's hard to do effectively since you have to isolate out the emotions each ring needs.