Evolving Ring Event Details

Only questions: Can they stack, and can you have multiple characters get the ring on the same account? This will make for interesting implications. Godly rings that ANYONE can get, poor or rich, unfunded or overly funded, casual or hardcore.

It's one-of-a-kind. There is yet to be any confirmation whether you can use both Lv17 and Lv16 rings though (?).