Defeat combatants in Nightfalls and the Guardian Games Competitive mode. Higher difficulty Nightfalls grant more progress. Completing Nightfalls with higher scores grants increased progress. Guardian Games Competitive mode and Legend difficulty or higher Nightfalls grant the most efficient progress.
Defeat combatants in Nightfalls and the Guardian Games Competitive mode. Higher difficulty Nightfalls grant more progress. Completing Nightfalls with higher scores grants increased progress. Guardian Games Competitive mode and Expert difficulty or higher Nightfalls grant the most efficient progress.