After a near decade absence after their 2006 album "Death Of A Dead Day," the English progressive metalcore outfit SIKTH dropped a little EP out as an appetizer to keep their fans salivating for yet another full album. Despite only having released two full-length albums, OPACITIES is actually the fourth EP following the twin EP output of 2002 and the 2006 release "Flogging The Horses." The band members are exactly the same as their previous lineup, so this is very much a genuine SIKTH release and once again the band delivers an outstanding cross-pollination of hard and heavy metalcore fused with their brand of extreme progressive metal that often reminds me of the type Enslaved weaved into their albums such as "RIITIIR." OPACITIES is a short but sweet EP with six tracks not quite reaching the half hour mark.