i think they ripped off themselves, if we look at kalmah's back catalog they've already used same melody in the song ''the black waltz'' (And she walks her way so treatled Leads away from the bless she´s earned...) even the intro is similar to the intro of black waltz just like 'heroes to us'...
It doesn't sound like old Kalmah (to me),except the leads are very swampsongish the style is more reminiscent their previous album with more neoclassical/symphonic stuff. But they never been so good imo!