Land Solar or Strand final blows in a Seasonal activity. Defeating combatants with finishers and landing final blows with weapons using Primary ammo grants additional progress. Opening a locked chest grants massively increased progress.
Land Arc final blows or final blows with the Prismatic subclass equipped in an Episodic activity. Defeating combatants with finishers and landing final blows with weapons using Primary ammo grants additional progress. Completing an activity on a higher difficulty grants massively increased progress.