As the response to the aura-empowered raiders who frequently invaded their homes, several of tribal important figures, including leaders, elders and shamans, made a conclusive decision together by creating Grimm-form shifting potion which would give their warrior the ability to gain their own Grimm-forms in order to strengthen their resistance and defense against the invasion of Aura-empowered raiders.

Combining with extremely specified ritualistic potion formula and utilizing long-forgotten local gods (known as pagan-gods) as inspirational archetypes for each transformable grimm-forms, they finally created a serial of potion formula which allow the user to transform into a variety of specified grimm-forms after very long time of research and modulation.

Related formula recipe including:

• [Extreme large quantity of [first-world] full-magical-energy plant and herbs (near 99% of them in extreme critically endangered status in current days)]= as stabilizer and additional painkiller for prevent the harmful and lethal corruption to user

• [Pseudo grimm-liquid-like substance (*must in condition of complete stable and entirely independent from the influential control of original host {aka dark woman})]

• [Crystallized transformational-form archetype bio-formulas (*involved utilizing great quantity of rare and extremely high-quality magical components which only about 1% of them in survivable and qualified condition in [second-world])(*must in condition of complete stable and solid)]