Matt Marinelli became vocalist in September 2007, and 2008 marked the year Borealis released their first full-length album, World of Silence.

Borealis featured a female vocalist in their initial years, geared more towards a symphonic metal sound.

The band subsequently had a show opening for Sonata Arctica with Matt Marinelli in Siobhan's stead.

Gregory helped Borealis achieve the type of sound they wanted, and the album exceeded their expectations.

[2] In order to play this album live while staying faithful to the rhythm and lead guitar tracks, Borealis needed an additional guitarist.

Inspired by Matt Marinelli's love for horror movies, the band created an album centred around the concept of a cult that sacrifices children in the name of their deity.

So we took that idea of the cult and of the children sacrificed and we put like a fictional twist on it [...] It's nothing that we would ever want to actually happen, but we find in the story telling point of view, it really has a lot stronger impact.

[15] In May 2021, on the band's Facebook page, keyboardist Vikram Shankar revealed that he was working with Borealis on a new album.

[17] In an interview, the band explained the origin of their name: "we were all hanging out one night and the northern lights (Aurora Borealis) could be seen above.

Borealis cites in interviews that when they formed they initially wished to emulate bands such as Nightwish or Sonata Arctica.

They have modified their sound a bit since their debut, claiming to be influenced by bands such as Symphony X and Stratovarius when playing as openers for these famous acts.

In an interview an anonymous Borealis member stated:[18] From the usual suspects like Symphony X, Evergrey, and Avantasia, to more obscure inspirations like Hans Zimmer's movie scores and Lady Gaga's top 40 hits, we all like it and try to blend it all in our writing.

Matt Marinelli was asked which three albums of any band had changed his life, to which he listed Mercy Falls by Seventh Wonder, The Inner Circle by Evergrey, and Century Child by Nightwish.