Novus upgrade to Nexus question

[Dhex]

I just got my novus weapon "Soul attunement complete!"

I must be really thick because I can't figure out now how to actually get the weapon upgraded to Nexus. All the guides I've found just stop at explaining the lights, etc. I've been back to Jalzahn, Gerolt, etc. No joy.

Talk to Jalzahn about Soulglazed relics.

Grind content with Novus equipped. Hardmodes, Extremes, Coil, Sycrus, Frontlines, Maps give you lights on completion. Some have bonus windows for extra light. Eventually you will maximize your light and can upgrade to Nexus (check it with your Zodiac Glass).