Isilblius, who has been a major character in Trial By Tenderness, is considered by the Gods to the "Ultimate Demon".  The Demons regard him as the "Ultimate Anti-Demon".  But those of you who have read TBT know that he is more horrific than either title.  Isilblius's only goal in life is to destroy all life.  Anything that lives and has a Soul...has no place in Isilblius's scheme of things.  Isilblius was put away by Kami-sama and Oni-same aeons ago because he threatened to destroy both Yggdrasil and Vanagdrasil.  Consequently, when he was brought back to existence, his evil nature led him once again to act with sordid malfeascence...

Isilblius DemonHeart

This is Avian's 'doodle' of a more evil, kaiju aspect of Isilblius when he desires to reveal himself in a more threatening, less human form.  This image strongly represents the cruel chaos of Isilblius, with a seasoning of alien-like monstrosity.  The visual impression of Isiblius's maldrorious intentions are laid bare; thus this work is entitled "Isilblius DemonHeart".  The 'demon' heart is not that of a regular Demon (of cours), but now you can see why Isilblius is often mis-labeled as the "Ultimate Demon" by the Gods.

Kudos to Avian for sharing his interpretation of Isilblius with us!