Thursday Catharsis was the extension of the Octagon project, when it became more "stoner/doom" than "black-metal".
They released their only demo in may'1999.
" Thursday Catharsis "
8 tracks demo recorded May'1999
Listen to Thursday Catharsis on Last.fm:
http://www.lastfm.fr/music/Thursday+Catharsis
Thursday Catharsis : "Thursday Catharsis"
Thursday Catharsis : "The Spell"