After seeing a perfect opportunity, Kraftvoll was able to launch the Explosion seishin spell toward the remaining members of the enemy team.
This seishin spell hit the area between the two remaining members of the team of the second grades which resulted in them getting hit by the recoil of this strong seishin spell.
Thanks to the defensive seishin spell they conjured earlier, the remaining members of the enemy team did not receive any life-threatening wounds from the explosion but they were extremely injured in the process.
Their defensive seishin spell wore off at the very end because of the great destruction caused by the Explosion seishin spell.
The effect of the Explosion seishin spell that was conjured by Kraftvoll did not have the same destructive power as Stark did in the past. This is only because there is a big gap between Kraftvoll's seishin cultivation base and his mentor, Stark's seishin cultivation base.