Soundgarden meet cartoon death-metallers Dethklok in their new clip

Cartoon death-metallers Dethklok battle Soundgarden in their new clip.

Soundgarden are mere days away from releasing their mammoth new greatest hits compilation Telephantasm.

There's one previously unreleased track on the record, called 'Black Rain', and the animators from cult-comedy Metalocalypse have chipped in on the new clip..

In it, Dethklok and Soundgarden battle inside giant mutant robot monsters. We think. It's pretty dark.

Metalocalypse co-creator Brendon Small explained it a little more clearly to Spinner.

He said "First off, [Soundgarden guitarist] Kim Thayil had a pretty strong idea of what he wanted. He had key words - monsters; big, huge, wide shots; Dethklok; getting them in there somewhere, and Soundgarden. And then this idea of this gigantic robot that's going to fight the monsters, Dethklok screws something up, and it's up to Soundgarden to kind of fix and save their home city of Seattle that's been under attack by these outer space monsters."

Telephantasm will be released on September 28 with the new Guitar Hero, as well as part of some expansive special edition bundles.