Complete the Lost Sector Skydock IV in the EDZ, and loot the Lost Sector chest.
Defeat a strong adversary in any Portal activity while using your Solar subclass.
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Your Ghost's scans detect a source of Solar energy in the EDZ. Specifically, it seems to be coming from Skydock IV. Investigate, and bring anything you find back to Ikora.
Ikora believes the best way for you to continue learning is by sharpening your skills against increasingly dangerous foes.
Seek out and test your Solar Light against the system's most perilous combatants.
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A tide of fiery power swells within. With a single breath, it roars to life.