'Ethereal' is an adjective.

1. The ethereal glow of the moonlight illuminated the garden.
2. Her ethereal beauty captivated everyone in the room.
3. The music had an ethereal quality that transported listeners to another world.
4. The mist rising from the lake created an ethereal atmosphere at dawn.

Ethereal Tomb was created in 1999.

No, the word 'ethereal' is an adjective used to describe a noun as extremely delicate and light in a way that seems too perfect for this world; for example an ethereal gown, an ethereal scene.

Ethereal Menace was created in 1999-07.