Once an Inferno, the Demi-Toa of Stealth now serves the other Demi-Toa.
About this creation
In a valiant effort to rid Kueva-Nui once and for all of Mukraatan, the Toa Mahi and the Toa Kueva ventured down into Mukraatan's lair to face untold horrors and eventually the dark entity himself. They fought everything from Rahi to Bohrok to Vahki to Dark Hunters, even several Infernos, killing them all without much of a struggle. Once they reached Mukraatan, they all combined their efforts in an Armageddon of sorts, the final blow landed by Tohuka, his sword in Mukraatan's throat. In his last dying breath, Mukraatan let loose a violent wave of corruptive radiation, rumored to be his blood, affecting the entire continent. At this point, the corruption seeped into the Toa Mahi, the Toa Kueva, and the Toa of Judgement, infusing itself with its hosts, creating Demi-Toa, or half Toa. As a result, their physical forms have mutated and they have gained considerably more power than ever imaginable. However, with that new power comes a temptation to misuse it, stronger than any other felt before. Mastering their new power marks the beginning of their new journey, for the corruptive radiation opened up portals all over Kueva-Nui , allowing untold horrors, access to the surface, such as Infernos or Krita Ghost Soldiers, even Sidi-Koro, who survived the battle by infusing her body with the power of her poison staff. This is where the journey begins.
Etherno was once an Inferno, one of the best. He could sneak up on matoran or rahi and quickly kill them with his claws or his sword, and that gained him fame and recognition among the underworld, for he could do it undetected.
However, as Mukraatan's corruptive blood exploded out onto the island, he was patrolling around a tank of protodermis when the shock-wave blew the glass into fragments, spilling the protodermis and the radiation onto him. They mixed with his body as they brought forth a new Toa, Etherno (Etheral (ghostly) Inferno).
Free from Mukraatan's grasp, he could then move freely to do what he pleased, though he was very confused of the state he was in. He encountered other Infernos who, not recognizing him, tried to attack him. Instinctively, Etherno dove forward, into the shadows along the wall, literally, and reappeared behind the inferno, hacking at him with a dagger and a trihanded sword (a sword with three handles for different positions. Used mainly among assassins). That day, he discovered his dagger was infused with a Kakama (mask of speed), and could take down enemies with blinding speed because of it. He also discovered that he could disappear into a shadow and reappear out of another shadow anywhere on the continent. His weapons, he found, were not energized, but his swiftness and speed more than made up for it. Almost immediately, the sought out the slayers of Mukraatan, found himself face-to-face with the Demi-Toa in another part of the cavern, and requested to join their ranks. He was taken in after Tohuka verified his story and has been working as a stealth agent ever since.
The trihanded sword and the dagger.
A Krita Ghost Soldier tries to sneak up on Etherno...
But Etherno vanishes into the shadows.
Little did the Ghost Soldier know that he was messing with a deadly predator in his native habitat.