Even though Zion now had the power to harm the sentinels, this didn't mean their attacks wouldn't harm him anymore. During his fight with them, he noticed two things.
First, the sentinels are not higher-level beings. This is evident from Zion being able to harm them and Karyndra being able to control them. Even though she was controlling them through their matrix, the matrix itself was not that of a higher power.
And second, they have the power to kill gods but not the body of one. This meant that they could still be killed normally if someone was strong enough to do so. This was also bad for Zion because it meant that his new suit wouldn't be as helpful as he hoped it would be against the gods.
This didn't take away from how strong they were, though, because now that Nth was taking things seriously, Zion was having a hard time facing her.
"I'll fucking kill you!" She cut open Zion's armor and punched him down to the ground.
