With the Omni Energy Authority, Alister had already made up for his flaws in terms of the energy within his body.
Furthermore, the Omni Energy Authority has another function and that is to devour the energy of others and use it to feed his Omni Energy. He could devour both owned and unowned energy.
Examples of unowned energy were wind energy, lightning energy, electricity, etc. On the other hand, unowned energy was energies such as the chaos-attributed mana inside Zanna's body.
Aside from his lack of power levels, Alister was virtually invincible now. As long as it wasn't someone way above his power level, he was invincible in the same power level and he could even fight those above his power level as long as they weren't that powerful.
After Alister's declaration, the world powerhouses who were watching what had happened here were eagerly anticipating the aftermath of this shocking event.