Maxwell won’t let St George jump, says he’s no match for Cairax

The hero glanced out the gate. The screaming was more ragged. Between the exes he could see the bursts of blue flame and dark gore. “It’s killing him. We can’t just—”
“No great loss,” said Max. “But either way, you’re the last person who should step past the seals.”
“I can take care of myself.”
“Not against that.”
Cerberus took three huge strides and set an armored gauntlet on Max’s shoulder. Her fingers flexed. “Let him go.”
St. George tried to throw himself into the air again. He couldn’t even jump while Max held him down.

Excerpt From Ex-Communication, pg 349
Peter Clines
https://books.apple.com/us/book/ex-communication/id635706546