BANG— BANG—
A loud metallic sound rang as an energy blast shot towards a large metal door.
The sound rang in the air for a brief moment before it disappeared completely. What followed after was the cacophonous sound of several alarms ringing, completely drowning out the banging sounds that ensued after repetitive attacks towards the metallic door.
"Step to the side."
Seeing that the attacks were not working, a duergar stepped up.
Holding onto a large metallic barrel in-between his armpits, the duergar channeled his mana towards it. Soon, spherical orbs of mana agglomerated towards the center of the barrel, forming a concentrated ball of energy.
The threatening energy expanded in the hall as it steadily increased in size.
Before long, once the ball reached a certain size, the duergar firmly planted both of his feet on the ground and discharged the energy.
BOOOM—!