Bam!
The many strange coins pinned the creature down as Dorian began his exorcism.
The reason why he waited until now to exorcize the creature was because he was releasing all that the creature had sucked out of its victims.
The creature was a Moon Gargoyle.
Though it could feast on particular victims, it also could nibble on the vitality of humans as though they were snacks.
First, it would suck out some vitality from one's face, making them look slightly pale.
Maybe the victims wouldn't notice it, but after a few days or weeks, they would get dreadfully ill.
With other creatures, once a victim's vitality was taken, there would be no way to retrieve it back from the creature.
All he would do then is to replenish them with talismans or various pills, elixirs, or powders that need to be taken over the span of time... Maybe even years for deadly cases.