To silence everyone, I let one remain alive while the rest were killed. Letting them live will be a big mistake. The last one I let to live is the only source of information for me at the moment before we enter the premises of the church.
He is currently unconscious after I electrocuted him earlier, knocking himself out. Normally, I needed them awake to get the info out of their mouth but I decided to not let him do so since him being unconscious is a big advantage for me.
This is because I managed to learn the spell [Mind Invasion]. It has several effects that is very similar to the effects currently used by the magicians to erase a memory of a mortal to remove parts of their memory. The higher leveled ones even has the ability to plant false memories to the person, allowing the magicians to deceive the person on what happened. Since I didn't practice it much, I only have slight mastery on it.
"[Mind Invasion]."