Time slowed down after Cyneah and Flos's arrival.
It was not a figure of speech because Stella had used her magic to control Time once more. However, she did not merely cast a spell, but released her domain.
Crackle! Crackle! Sizzle!
The whole surroundings crackled from the huge magic fluctuation that occurred right after.
The cause of the fluctuation was not entirely due to Stella's domain. It was all because Flos and Obstruction chose to release their domains as well!
FOOOOM!
An invisible and suffocating force expanded at least a thousand meters with Flos, Obstruction, and Stella at the center.