Cursed Amulet in a Portal Chamber - Anime

An anime-style illustration of a cursed amulet within a portal chamber. A circular stone chamber carved with glowing arcane runes along the walls. In the center, a cursed amulet floats: ornate dark metal frame, a cracked crimson gemstone at its heart, chains and sigils etched into the metal. An ominous red and emerald glow leaks from the gem, with wisps of dark energy curling through the air. Behind and beyond it, a colossal portal swirls with violet, indigo, and electric blue energy, framed by weathered arches. The floor and surfaces reflect the portal's light; dust motes drift in the air; pale blue torches cast cool light. Style: bold anime linework, vibrant cel-shading, high detail, dramatic lighting. Perspective from a low angle looking up at the portal as the amulet pulses, creating a sense of ancient power and danger. Mood: eerie, awe-inspiring, cursed.