After Dante flew into the necropolis alone to scout the furthest area from the checkpoint, the other mafia members infiltrated it in small groups of two to three people.
The only people who entered the necropolis alone, apart from Dante, were Imera and Asphodel, who began flying to the other furthest points of the city.
The main objective was to figure out how much of the city had been corrupted. Several districts were covered in death's ichor, and the corruption kept growing.
While the NSS was able to discover that the necropolis expanded quite slowly, there were certain times when the growth would accelerate substantially and cover a large area in mere minutes.
Curtis, one of the GTS leaders, paired up with Zac and made their way inside the necropolis a few minutes after Dante had left.