Grontimügarr comes from Shrapnel of Darkness and is property of Heavenbrand. Its first appearance under that name was in Shrapnel of Darkness, where it embodied a true bullet hell. https://scratch.mit.edu/projects/99448062/ In my series, Night of the Mongolian Safari, it is the Forerunner God of Pain and was both the final boss of Game 4 (Destati) and the final boss of Game 5 Disk 1 Book 4, meeting its final end at 9 in the morning of the day before Halloween in the terran year 2015 CE. It also happened to be one of the eight Horrorterror Lords. The music is Forgotten Blood, a semi-original composition consisting of Phrynna's Organ Jaws (the final boss music for Epic Battle Fantasy 2,) Phrynna's Fallen Blood (the final boss music for Epic Battle Fantasy 4,) and a snippet of the chorus of Destati from Kingdom Hearts.