With my own abilities. For those who plan on venturing into ViViD, they can see me and I'll create a Noble Phantasm for their use temporarily. ....a weapon of legend.

[Because that literally needed a description.]

In short, it'll grant players power well beyond their means and definitely send alert to whomever is watching. With Rin, I can hopefully keep out of sight so the methods aren't discovered and we can keep those who are 'above us' guessing.