Renascentia

In Renascentia, there is no monster, but enemies do exist. They are called Revil, a group of creatures living on the shades in humans' heart. Actually, they just look like a shadow with eyes. Revil's life cycle has 4 steps: egg, larva, adult then the death.
Of course, they will interact with the player. Before you can find them, they are tracking on you or running away from you, which depends on their feature. It's a bit hard for you to find them, since they are transparent until they are close to you. But you can use a skill named "Concentrate" to detect them with a cost of 10 mp(Mind Power). When you concentrate, you can get 5 seconds to check where they are. It's a system like time-limited radar i guess.