Soul flames weren't like ordinary flames that inflicted physical damage, once they came in contact with their target it directly attacks the soul.
The worse news was that soul flames ignore physical defenses and the more soul essence it burned the stronger and more persistent it became.
After the emerald flames were done with the target's soul then it would burn the innards turning the unfortunate person into a husk.
The situation in the 2nd and 3rd carriages was getting more chaotic as seconds passed. One of the mercenaries on the 3rd carriage fell into the hatch causing the vicious emerald flames to spread to every member inside the carriage dooming them all.
"Ahh!"
"Help!"
"Ahh!"
Screams of agony echoed in the area as they tried to put out the flames but to no avail.