A shitty response to what defines an undernova, get ready for hyperspeed. Open.
An undernova is defined as something that collides at the base of the chain reaction. No event horizon, but a cataclysm. So if that helps any.
If we stare deep into it, it hides many things. Secrets exposed or what somebody is doing. What excites me is your gifts, not only, but what lies deeper. Just think about what lies out there and how fast you could be taught, higher intelligences, and sketchy ones.
I can't find the words to convey that last bit. The ability to understand what's next is challenging, it's temporal, physical, defining, real time, and quadrants look like anything conceivable.
Don't try to teleport too often, unless you go there, idk... You meditate. Nothing else...