Sküll is a death/crust band out of Trondheim, Norway, that also incorporates elements of thrash, punk, and even a little sludge.
On the Sküll demo, we're given 7 songs in about 22 minutes. And you'll hear no clunkers or duds here. The first three tracks have more of a death/crust feel ("Vision apocalypse" is a bit sludgy), whereas the remainder of the demo has more of a thrash/punk feel ("Black Thrash Attack" couldn't have been better titled).
The Sküll demo is available as a free download from the group's bandcamp page, so be sure to check it out.