The Mortiverse
Octodecaogdoad Nona-Macrobe Amidah Apocalyptic Black-Hole-Spawned Legion Elder Unelemental
Xona-Titanic Outsider (Extraplanar)
Hit Dice: 1,584,563,250,000,000,000,000,000,000,000d1000+ 627,710,173,312,402,500,000,000,060,213,403,500,000,000,000,000,000,000,000...