Weather Manipulation

Weather Manipulation was the Quirk used by Nine.

Description
Weather Manipulation allowed its user to freely manipulate all types of weather. Nine had shown he was capable of creating large storm clouds that enveloped entire islands, summon lightning bolts, and even create giant tornadoes. This Quirk also allowed him to manipulate wind and granted him flight. The storms created from this Quirk were strong enough to severely damage an entire island.

Weaknesses
Weather Manipulation's incredible power put an enormous burden on the user's body, causing cellular degeneration as well as excruciating pain that caused Nine to faint. This weakness had proven to be near-fatal and resulted in Nine having to use his Quirk sparingly. This effect was worsened after Nine had received All For One, and he would eventually reach his limit upon using his multiple Quirks continuously.

Nine's lightning bolts could also be redirected by other electricity Quirks, like Electrification, that could act as lightning rods.

Usage
Nine's Quirk had a lasting impact on his life, as being born with such a powerful ability that was deemed as "godlike" resulted in him being ostracised from society. This would lead to Nine developing his Social Darwinist worldview in that the strong should rule over the weak.

Nine was very proud of his Quirk's power and its capabilities. However, due to the severe cellular degeneration of his Quirk having ravaged his body, he sought a Cell Activation Quirk to heal himself and allow him to use Weather Manipulation to its fullest extent without facing this drawback.

Nine had used his Quirk for offensive purposes, summoning lightning bolts to incapacitate his opponents. When enraged, Nine unleashed Weather Manipulation's full power, forming a gigantic tornado and creating multiple lightning bolts that ravaged Nabu Island.