As a matoran he was the most powerful and as a toa he is even more powerful.
About this creation
After being attacked by 3 Bohrok-Kals Hijuaro tried running and hid in a cave there he rested on a rock that then started glowing. Hijuaro then picked up the rock and was transformed in to a toa by the rock (which he latter learned was a Toa Stone). Hijuaro still has all his powers from when he was a matoran but now his legs and arms grew larger and more powerful. His sword also grew longer and more powerful. His shield also grew 4 small containers that could store the energy that his shield absobs. He can then transfer the energy to his sword right away or store it and use it latter. The energy can also be used to heal himself or others, it can also be used to increase his strength. If he collects enough energy he can create an exterior shield infront of his own shield thus canceling out an equal amount of energy.
After finding the stone and became a toa he exited the cave and saw the 3 Bohrok-Kal wandering around. When they saw him they immediately attacked him again but with his new toa powers he easily defeats the 3. After that he wandered Kueva-Nui (credit to Matt D. on the island name) and battled stray rahi that attacked the matoran. Soon he meet up with Akutori and the others.
New mask for the same reason as the matoran form and from now on all forms of Hijuaro will have the black masks except for the alt powers v.7 normal and flight mode (and v.8+ if I make one) but the mask will still be on his alt power mask holder.