When Jack yelled, "fire!" Nothing was shooting out of him. The bright glow that had accumulated in his body simply faded away. He couldn't feel the overflowing mana anymore. Additionally, his Strength of Hope ended even when it should still have a few minutes left.
Hope's sanctification on Grace, Jeanny, and Paytowin also ended.
"Hey, dude. Did you f*ck this up?" Paytowin asked in bewilderment.
Jack was also confused. The accumulated mana within him felt like it could be directed at something, but why did nothing come out when he triggered the energy release?
While he was still confused, he heard an inhuman scream from above. He looked up and saw the demon lord was the one who screamed. It had stopped moving even when Mihos, Garuda, and Howard's arrows were striking his body. It was as if something was causing it more pain than those hits.