The Shadowrealm Sanctum is a dark and ominous realm that lies on the edges of reality, open only to the brave souls who venture along the paths of darkness. It's a bizarre and otherworldly terrain where nightmares materialize and age-old shadows murmur esoteric secrets. Additionally, it serves as a sanctuary for ponies crafted from shadows and mists resembling nightmares, which safeguard the region against intruders.