There is 1 Dead Ghost to be found in the Burning Shrine. They can be collected during any match. Each Ghost can only be collected once per account.
Ghost 1[edit]
Head outside and toward the middle of the map. You will see some large stone structures beyond the boundary of the map. Head to the square stone structure at the very edge of the crucible map.
Head to the back of the rock structure. This will require you to go outside the map's boundary for a short while. You will see the ghost at the base of the rock structure.
