The Infinite Battlefield of Acheron

cheron has four layers, each made of enormous iron cubes floating in an airy void. Sometimes the cubes collide. Echoes of past collisions linger throughout the plane, mingling with the sounds of armies colliding. That’s the nature of Acheron: strife and war, as the spirits of fallen soldiers join in endless battle against orcs devoted to Gruumsh, goblinoids loyal to Maglubiyet, and legions assembled by other warmongering gods.
Optional Rule: Bloodlust Acheron rewards a creature for harming other creatures by imbuing that creature with the strength to keep fighting. While on Acheron, a creature gains temporary hit points equal to half its hit point maximum whenever it reduces a hostile creature to 0 hit points.

Lower Plane
Alignment:
LN, LE

Planar backdoor to The Strife Emperor 's domain

Planar Backdoor to The Ruiner 's domain

Source of The River of Woe, Acheron