I constantly feel like killing people, is this normal?

This has been here for a while. It started with me being bored and going into a land where i protect huge crowds of people from bad people trying to kill them. I would protect them by killing them. It then just got to the point where i was bored and thought about killing the people around me, even if i knew them and thought of them as a little bit of a friend. It has gotten to the point where i just think about it because it is some what calming. I was diagnosed with depression if that helps. Don't know why it would but thought i should say. I go into a lot of detail of how to kill them, mostly with an axe. I like to do it in the most violent and the longest way possible. Nobody is exempt from it. I think about it even in church. I think about killing babies, children and even sometimes killing parents just to see the look on their child face. I really don't know. This has even gotten into some action where i have cut of a girls finger and sliced a dudes face. I am 14. Ask if you need more detail