Just saying this, but it takes over one hundred hours to make a tulpa (or, in my case, a month of extreme obsession in which said obsession becomes the very thing my mind revolves around).
You're basically planning out a whole 'nother being and slowly enforcing that image, personality, smell, feel and general presence into your subconscious. It eventually becomes a sentient being as a result of being in your subconscious, where you are unaware of what can happen.
I am not surprised I didn't get my cutie mark in explaining.
Hope I helped somewhat.