[Tsukasa]

Grim Essence: A formless floating orb that can be found wondering places that have been influenced with evil.
It sometimes loses small powdery deposits, which have been researched to reveal dark energies which are known to have commonly been bought out by past incantations of forbidden magic.
Being formless and assumed otherworldly it is immune to both Physical Attacks and Spells of common element.
Such research has been performed with arrogant simplicity due to it for some reason not-attacking.
Recent researcher's logs have shown signs of unintentional self-vocal silence when aggravating the inner glowing particles with non-adamantine solid materials.
It has been imbued with the name “Grim Essence” due to all of the odd behaviours mentioned above.