A KIND OF CHINESE SYSIPHUS
Shooting down 8 Suns with a bow and arrows its not an easy task. You need more than stamina, you need all the Ki available in the Universe. That was Hou-Yi's (the fellow up here) impossible task, and he fulfilled it with astonishing precision. Much to the dismay of the Immortals and the envy of some Gods. Our earth, after his deed, remained with just one Sun.
But the other Suns were not wasted. They fell inside his head and became centres of light. In this contemporary mask the secret is preserved. For those who know.