There are Eight bands with name Sphinx. 1) Spanish metal band formed officially in 1994.
They have a very personal style with influences of the classic spanish metal, but they have introduced power metal elements, developing a faster and more modern style.
2) Italo disco band from the '80s 3) Russian Symphonic Gothic Metal
They have released their latest album in 2009 called Призрак
See www.sphinxmetal.com for more info ( not in english)
In the past there was only one album in 2003