Chthonic

[Sarah]

Pertaining to the earth; earthy; as, chthonic religions.[The] chthonic character of the wife of Zeus. Max Müller.

[Sarah]

Aside from its conventional meaning (look it up) can be used as a substitute for cool or worthy in the company of fringe metalheads and acolytes of the Necrowizard.

[Sarah]

A [black metal]/[folk metal] band from Taiwan, they have been around since 1995, and have made 5 studio albums, and are scheduling their newest album for june of 2011. Their lyrics focus mainly on the subjects of [Chinese mythology], [Taoism], and political stuff.
Their band name is pronounced Thonic, not Kthonic, Chuhthonic, or anything else.