An external nightmare is a terrifying and distressing event or situation that occurs in the physical world, separate from one's own mind or consciousness. This could include natural disasters, accidents, acts of violence, or any other real-life event that causes immense fear or stress. External nightmares can be traumatic and have long-lasting effects on individuals who experience them.

An internal nightmare is a frightening and distressing experience that takes place within one's own mind or subconscious. This could manifest as a vivid and intense dream filled with terrifying imagery, unsettling emotions, and a sense of helplessness or impending danger. Internal nightmares may also occur during waking hours as intrusive thoughts, irrational fears, or flashbacks to traumatic experiences. These nightmares can be just as impactful as external nightmares, causing significant emotional distress and disrupting one's mental well-being.

The empire of Nihilthar is a sprawling and oppressive regime that casts a shadow over the land, instilling fear and despair in its subjects. Ruled by a tyrannical emperor who rules with an iron fist, Nihilthar is a land of darkness and despair, where individuality and freedom are suppressed in favor of strict conformity and obedience. The empire's blackened skies are a constant reminder of the despair that reigns over its people, while its towering citadels serve as foreboding symbols of the emperor's power and control. The land is plagued by poverty, famine, and disease, with those who dare to speak out against the regime facing harsh punishments and retaliation. The name Nihilthar itself conveys a sense of emptiness and hopelessness, reflecting the bleak and desolate nature of the empire. Its inhabitants live in constant fear of the empire's brutal enforcers, known as the Shadowguard, who ruthlessly crush any dissent or resistance. The empire of Nihilthar is a vivid representation of an external nightmare, a dark and foreboding realm where the light of hope struggles to pierce through the shadows of oppression and despair.

In the vast expanse of the cosmos lies a realm known as the Voidmare, a nightmarish dimension of cosmic horror and unimaginable terror. The Voidmare is a place where the laws of reality are twisted and distorted, where eldritch beings of unfathomable power and malevolence lurk in the shadows. The skies of the Voidmare are a swirling maelstrom of swirling black clouds and shimmering stars that seem to mock and deride those who dare to gaze upon them. The very fabric of space-time is warped and twisted, creating nightmarish landscapes of jagged obsidian spires, churning seas of inky blackness, and howling winds that carry the whispers of ancient, long-forgotten horrors. Within the Voidmare, time flows erratically, with moments stretching into eternity and flashing by in the blink of an eye. The denizens of this cosmic nightmare are twisted and corrupted, their forms contorted and grotesque from exposure to the eldritch energies that permeate the realm. Those unfortunate souls who find themselves trapped in the Voidmare are doomed to wander its twisted corridors and labyrinthine passages, their minds slowly unraveling as they are tormented by visions of their deepest fears and darkest desires. The Voidmare is a cosmic external nightmare, a realm of cosmic horror and existential dread that threatens to consume all who enter its dark and twisted embrace.