A heavy guitar sound and epic synths start off the ep along with some melodic riffing that brings in elements of thrash and after awhile grim screams are added into the music an d the music starts adding in more symphonic elements and blast beats can also be heard at times and the music has more of a mid 90's style.
Throughout the 3 tracks you can hear a great mixture of slow, mid paced and fast parts and the solos and leads also add more of a melodic metal style to the recording and the riffs also bring in a decent amount of melody and you can also hear all of the musical instruments that are present on the recording and the vocals also bring in deep growls at times and they close the ep with a cover of Emperor's "Cosmic Keys"..
Formicarius plays a style of symphonic black metal that is very heavily rooted in the mid 90's style and also brings back the aspects that made the genre interesting back in those days, the production sounds very professional for being a self released recording while the lyrics cover darkness and occultism themes.
In my opinion Formicarius are a very great sounding symphonic black metal band and if you are a fan of this musical genre, you should check out this ep. RECOMMENDED TRACK "Under Darkness". 8 out of 10.