You are now equal to one of Japan's Three Great Monsters. The boss that governed the Oni within the castle structure on Mount Ooe. Shuten-dōji.
Your Oni form has been enhanced, allowing you to bypass all of your physical limitations while drastically enhancing your senses making you capable of detecting all movements and flow of magic within a range of 500m, as well as predicting your opponent’s movement. Its appearance has also been altered, as instead of merely gaining a pair of horns, your entire body now changes into a gigantic ogre-like creatures with sharp claws, wild hair , red skin and horns growing from your head. Your base form is now equal to what your Oni form was before the enhancement.
Your magic reserves are greatly boosted, and all of your magic enhanced by your demonic attributes. Using your magic, you can create/turn people into an Oni. This drains your magic greatly, and at its base will only allow you to create a maximum of 5 per week. All Oni will feel a instinctive loyalty to you.
You gain an intense love for alcohol, as well as poison immunity. In fact, you gain a minor permanent boost in your stats when drinking alcohol (or poison).