The explosion was far worse from the outside.
While Aaliyah and Thaddeus were able to avoid it because of Plaguelord's artifact, the forces fighting to block the star destroyer weren't so lucky.
Countless warriors lost their lives.
But with their sacrifice, they saved countless more.
The star destroyer was a planetary object despite being constructed by man, so its collapse wasn't something light. The sheer amount of damage it did to the starry sky alone would remain for hundreds of years to come.
Countless hundreds of kilometers of space distorted chaotically, and traversing the area around Throh became nearly impossible.
In a sense, Heaven's Army had faced defeat on this battlefront as well. After all, aside from destroying the star destroyer, the main goal of the attack on Throh was securing a supply route to the Soul World.