Aurora Borealis define “melodic death metal” in the best tradition of the old school: it’s death metal, but it makes use of melody.
It has nothing in common with the new pseudo-genre “melodic death metal” which sounds like a power-metal/metalcore crossover with an emphasis on frilly melodic fills. You and your rape rump roast can go enjoy that elsewhere.
Instead, it sounds like Fallen Christ crossed with Luciferion. It’s good stuff:
Scenes from the making of the new Aurora Borealis album:
And some classic material from early in their career: