Mindless is (was?) one hell of a crusher of a hardcore band with Faiza of Faithealer and Hatred Surge on vocals. Aside from some idiosyncratic flourishes here and there, the band stays true to the lull you with slow, heavy riffs, then crack you over the head with a cudgel of blast beats method of hardcore. Crossed Out did it, Extortion does it, and I'm blessed with a wooden ear that never gets tired of hearing it!
The Mindless 6 track demo tape
It's doubtful (limited to 100 copies), but you may still be able to get a copy here.