Vestigium has a very interesting mechanic based on dice pools. It is a simple and efficient way to represent the concept of balance between a human bearer and their sentient magic artifact.
I like the idea that the magic come from Vestigium (the magic artefact) rather than the classic human-being wizards.
The only drawback is that the document lack of a skill/power list but this is easily fixed by taking inspiration from another TTRPG source.
Great job!