In 2005 about Samhain three warriors came together and decided to honor their ancestors. They knew traditional heavy metal, and liked it a lot. They wanted to mix this with the Music of their ancestors and honor the gods by this. After practising a while they made their First Celtic heavy metal songs. They decided to add an extra guitarist. The warrior also decided it was their task to free the world form the evil trolls, not all trolls are evil, only those who are bother the innocent. To honor the moon, the symbol of their goddess, they called themselves Lunarium.