I was browsing the Coppermind once again and found another topic that I believe is under discussed, Old Magic.
there are a few examples of it but I'm still confused as to how it works and what exactly it is? The Coppermind said it is "manifestation of Investiture on Roshar that is known to predate spren bonds" but that dosen't exactly answer my questions about where it came from and how it works.
The Example of Old Magic that I did find is the Nightwatcher but even the Nightwatcher is debated as whether or not to have Old Magic because it's simply her Claim to have it not that she actually does. So yeah I'm very confused.