Ikora looks pleasantly surprised by the strange object you unearthed in the EDZ. "How did you discover this? It appears to be a relic of the Golden Age, and it resonates with Solar power." Sure enough, the emitter glows and dims in time with your breathing when you hand it over.
She makes a thoughtful sound, looking you over. "It would spell trouble for the Vanguard if other relics like this fell into the wrong hands. Guardian, there is an arms dealer operating out of the EDZ. We believe he is supplying weapons to the Shadow Legion, so I'm sending you to shut down his operations."
Ikora gives you a small but genuine smile. "Here. This will empower your Solar abilities further." She presents you with a piece of armor; it's soothingly warm to the touch. "I have every confidence in your victory and high hopes for your potential. When you return, seek out Banshee-44. He'll have something for your efforts."