Invocator is a Danish Technical Thrash Metal band from the 90s. Not much else I can say to you. Just one Of those extremely kick ass thrash metal bands that never made it big in the underground of thrash, but they are still around and still unknown.
They came out with four albums through there existence.

From the album Excursion Demise

Absurd Temptation
http://www.youtube.com/watch?v=xWi0Fbk-JiM

Excursion Demise
http://www.youtube.com/watch?v=Ml6iQ...eature=related

From the album Weave The Apocalypse

Through The Nether To The Sun
http://www.youtube.com/watch?v=cL-jy...eature=related

From My Skull It Rains
http://www.youtube.com/watch?v=PEUZ5...eature=related

Condition Critical
http://www.youtube.com/watch?v=LLRmd...eature=related