Heading into the Dead Lands, each Phantom was prepared for the dangers of the monsters.
The Phantoms could not rely on any other Phantoms for help, but... unlike the Citadel, which was all about survival and fighting against monsters, the monsters had nothing of the sort.
Dead Lands wasn't synonymous with Citadel in the monster world, because the monsters weren't some cohesive army or organization. They were disparate, had no common goal, and were willing to fight each other if there was a good reason.
The more experienced Phantoms were well aware of this, and Adam was among them.
He had seen monsters fight many times before, especially in Salt Village, the anomaly cluster. Then, Thunder Demon started a real massacre in which all monsters, anomalies, and Phantoms participated.