The baby abomination, who still hadn't received a name, was, contrary to Zach's expectations, not easy to deal with. The baby's supernatural strength aside, he was incredibly fussy.
He wasn't easily scared, at least not for a baby. And it wasn't like he was needy or anything. With his innate physique, the baby would be just fine even if a house was dropped on him. The baby was mostly bored.
At first, Zach and the others thought it was because they had brought him out of the Underworld and cut his access to abundant underworld energy. They risked bringing him to the city to let him absorb some and alleviate his distress.
It worked for a little bit. It was only after some time and a period of loud crying that they figured out it only worked because it was new and interesting.