There is more than one artist with this name, in order of popularity:
1) Liar is a straight edge metalcore band from the H8000 scene in Belgium. Early '90s they introduced influences of thrash, black and death metal in hardcore, when there were only emo and youthcrew bands on European soil. Debut cd Falls of Torment was released through Goodlife Recordings in '95 and shook the scene with it's heavy Slayer-influenced metal/hardcore.
In '97 Invictus was released, one of the best metalcore albums ever from Europe and…
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