Land Solar or Strand final blows in Gambit. Defeating targets with melee damage and with weapons using Special ammo final blows grants additional progress. Defeating Guardians grants substantial progress. Completing a Gambit match grants massively increased progress.
Land Arc final blows or final blows with the Prismatic subclass equipped in Gambit. Defeating targets with melee damage and with weapons using Special ammo final blows grants additional progress. Defeating Guardians grants substantial progress. Completing a Gambit match grants massively increased progress.
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"Haven't seen anything that bright since the Dark Ages!" —The Drifter