feature but something far more stylish and cerebral -- and , hence , more chillingly effective . 
(ROOT (NP (NP (NN feature)) (CC but) (NP (NP (NN something)) (ADJP (ADVP (RB far) (RBR more) (JJ stylish) (CC and) (JJ cerebral)) (, --) (CC and) (, ,) (ADVP (RB hence)) (, ,) (ADJP (RBR more) (RB chillingly) (JJ effective)))) (. .)))
(ROOT (NP (NP (NN )) (CC ) (NP (NP (NN )) (ADJP (ADVP (RB ) (RBR ) (JJ ) (CC ) (JJ )) (, ) (CC ) (, ) (ADVP (RB )) (, ) (ADJP (RBR ) (RB ) (JJ )))) (. )))