The Phantom Agony is the debut studio album by Dutch symphonic metal band Epica. It was released in 2003 by the Dutch label Transmission Records. It is the first album recorded by guitarist Mark Jansen after his departure from the band After Forever. On this album, Jansen continues with the collection of songs that make up The Embrace That Smothers. The first three parts can be found on Prison of Desire (2000), After Forever's debut album, and the following three parts can be found on The Divine Conspiracy (2007), Epica's third album. These songs deal with the dangers of organized religion.

Symphonic metal is a cross-generic style designation for the symphonic subsets of heavy metal music subgenres. It is used to denote any metal band that makes use of symphonic or orchestral elements. The style features the heavy drums and guitars of metal with different elements of orchestral classical music, such as symphonic instruments, choirs and sometimes a full orchestra, or just keyboard orchestration.