Astasena (Sanskrit: Aṣṭa = eight, Senā = army/legion) refers to the "Eight Legions of Devas and Nagas" (Tianlong Babu in Chinese), a group of divine beings and spirits in Buddhist mythology who protect the Dharma. They frequently appear in sutras like the Lotus Sutra, representing a diverse, powerful force of non-human guardians, including the Garuda, Yaksa, and Asura.