For all of those who don't know. Here is the story for Seihu's sword.
-When Seihu became a Toa, he received the PhotoSmiter from the Metru Nui Suva. In addition to being used for melee combat, the PhotoSmiter sword can channel Seihu's light powers, absorb and reflect light, and focus light to make lasers.
The blade also has a radiator grill, b/c I wanted to give it a bit of a solar-powered feel.