I am actually a very kind person

Probably because Zick was tired from wracking his brain all the time, his thoughts had been steering towards unwanted subjects subconsciously from the moment he entered the Jhesker alchemy tower.

Noticing this, Zick breathed in deeply to focus while walking before the altar near the captives. 

When Zick put more force in his legs, there was a sturdy reverberation coming from the floor beneath his shoes, as if he was stepping on a limestone floor. 

In the silent room, the sound of Zick's footsteps put an invisible pressure on the captive's mind. Most of them were filled with chills looking at the masked man, Zick walking towards them with unstoppable steps. 

The sight of the guards and alchemist being dissected to pieces passed by before their eyes. Even after killing dozens of people, this man before them showed no reaction at all.

He was evil without a doubt, such thought appeared in these captives' minds.