Bloodline is a song by the Swedish power metal band HammerFall, which tells the story of the fall of Asgard - the realm of the Norse gods - and the subsequent rise of a new bloodline of warriors who seek to avenge their fallen brethren and reclaim their homeland. The lyrics suggest that Asgard has been destroyed by some external force, leaving the valkyries - the female warriors who choose the souls of fallen warriors - weeping from the sky. The gates of the castle are in ruins and flames as the final defenders of Asgard prepare for their last stand against the invaders. Despite the overwhelming odds against them, the warriors of the new bloodline have sworn a brotherhood bound by fate and are determined to take back what is rightfully theirs. They invoke the power of Odin - the king of the gods - and vow to reclaim their lost promised land, even if it means a great sacrifice. The song's chorus declares that the bloodline of these warriors is what unifies them and gives them the strength to rise again. Their steel will protect them, and the power inside will make them immortalized. They believe that Asgard must fall to be reborn, and they are the ones who will rise above all and claim their true domain. Bloodline is ultimately a song about perseverance, brotherhood, and the unbreakable spirit of the warrior. The lyrics suggest that despite the devastation and chaos of war, there will always be those willing to fight for what they believe in and to honor the legacy of those who came before them.