Well of Light

In Gambit Prime, a Well of Light appears once all Primeval Envoys are dead and the boss's immunity shield is down. It grants the Primeval Slayer buff for 30 seconds, after which the shield returns and new envoys spawn. The buff stacks with each Well the team creates. Sentry armor perks such as Light of the Defender also work inside a Well. Not to be confused with the Warlock super Well of Radiance.