Taming the Storm
Complete the Lost Sector Exodus Garden 2A in the Cosmodrome, and loot the Lost Sector chest.
Your Ghost's scans detect a source of Arc energy in the Cosmodrome. The Servitors in Exodus Garden 2A seem to be guarding it. Investigate, and bring anything you find back to Ikora.
"Meditation will only take you so far. To truly understand Arc, you must allow it to race through your very soul." —Ikora