The aquatic power blade1, 2, 3, 4, also called the aquatic power sword5, power sword6, 7, 8, 9, 10, power blade3, aquatic fire blade11, or fire sword6, was a sword-like weapon that served as Jaller's Toa tool when he was a Toa Mahri. Jaller used it to channel and focus his elemental power of fire.6, 8 Although Jaller struggled to use his fire power underwater4, he could make the power channeled through his blade so white-hot that it could burn even underwater.6 The aquatic power blade was a finely balanced blade specially tempered to withstand extreme heat, even up to nova blast power.8
Jaller acquired the aquatic power blade when he was transformed by the Mask of Life from a Toa Inika into a Toa Mahri. Presumably, his former energized flame sword was transformed into the aquatic power blade.12 Jaller presumably continued to use the aquatic power blade on Spherus Magna.