拔剑为你战天下起舞为你绝江河
[bá jiàn wéi nĭ zhàn tiān xià qĭ wŭ wéi nĭ jué jiāng hé]
This username combines dramatic expressions of loyalty and dedication, implying that the person would fight (literally 'draw the sword') for someone they care about and dance for them as well. The user is expressing their deep affection and willingness to go through hardships.