Nathan Catsofast's super form Phoelix takes on the colors and flames of the phoenix, replacing a flaming tail with thick tail feathers and growing feathers on top of his hair. He dons a black firefighter outfit and becomes muscular due to its heightened powers given by the strange radioactive crystals, his super speed is not affected by them however. He becomes stoic but aggressive, yet excitable in some cases.

His ax is also transformed, changing and sharpening its head shape and adding the sharp metal on its end-grip. His weakness lies in his sweatbands on his wrists. Should they be cut with a blade, and he'll lose his abilities to generate wings and to solidify fire, unless they are restored.

“Forgive me if I look intimidating, this is my happy face, in this form. But if you wish to ruin my mood for your own amusement, don’t even think about putting out my own fire.” -Nathan Catsofast

Form Powers:
1. Flaming Wing Manifestation: Nathan has the ability to form flaming wings, allowing him to fly with great speed; Formed wings dissipate with water or non-flammable liquids
2. Fire Absorption: His fireproof fur becomes redder and hotter, to the point of even absorbing fire, strengthening his powers; Absorbing fire beyond his limit causes explosion in a range of 10 meters
3. Fire Solidification: He can solidify fire into weapons, which are less effective than ordinary ones but can be deadly in numbers, however, formed weapons last up to 30 minutes, Nathan can only solidify fire after 10 minutes
4. Heat Manipulation: He can generate heat via waves or touch without immediately starting the fire, ranging from 100°C (212°F) to 5000°C (9032°F)