Avantasia is a symphonic metal project created by Tobias Sammet, vocalist and frontman of the power metal group Edguy. The project's title is a portmanteau of the words "avalon" and "fantasia" ("fantasy") and describes "a world beyond human imagination" (a quotation from the booklet). The project consists of a self-titled EP, two full length albums with the subtitle The Metal Opera, two EPs called Lost in Space, and the upcoming album The Scarecrow.

The project is described as a "Metal Opera" because it has an underlying plot and each role has its own singer, though it's not an opera by the classical definition. It's merely a collection of pieces, which refer to the individual points of the plot printed in the booklet.

From a stylistic view, the majority of the songs are melodic power metal meshed with a voluminous sound, many orchestral passages and choral parts, gaining Avantasia recognition as symphonic power metal. One song from each part, "Inside" and "In Quest For" respectively, is accompanied almost exclusively by piano. The first part also contains three short instrumental pieces.

The most complex piece is the first song of Part II, "The Seven Angels", featuring seven of the eleven singers. The song is over 14 minutes long and contains a classical "stanza/refrain" part, two guitar solos, choirs, a passage with piano accompaniment, and an epic finale. It also plays an important part in the plot, as it serves as summation of the first part, and has caused discussion due to the inclusion of lyrics not printed in the booklet.

The Scarecrow, Twisted Mind, The Scarecrow, Shelter From The Rain, Carry Me Over, What Kind Of Love, Another Angel Down, The Toy Master, Devil In The Belfry, Cry Just A Little, I Don't Believe In Your Love, Lost In Space,