Son of the Devil

How do I understand "collect the key"? Does the one who obtained the key fragments have to approach the tomb? There are no explanations in the task, only - "Loot the tomb." The keys are, of course, virtual.

There are 2 key fragments in two buildings (Blood Arenas). Once they are found, you need to enter the Conflux of Elements building, the fragments will be combined, and access to the tomb will be opened.