Vanguard Alerts

Vanguard Alerts is the weekly activity system introduced in Week 2 of Destiny 2: Renegades. It is found in the Vanguard Alerts tab of the Seasonal Hub. Each week the playlists rotate, and the tab shows the rewards and challenges for each.

The Arena Ops Alert is built around six-player PvE Arena missions with preset modifiers, which are quick to finish. Completing the first stage of an Alert category earns a weekly bonus: 50 Chronologs for the Vanguard Alert, or 50 Bright Dust for the Arena Ops and Crucible Alerts.

Grandmaster Alerts are harder versions of the activities. Completing one at Grade B or higher rewards a pinnacle weapon with the Accelerated Assault origin trait and bonus XP.

The source is from the system's launch, so the rotation and rewards may have changed since then.