In "Where Icathia Once Stood" he chopped an ascended's head off. Now he has 3000~ years more experience. I think it's plausible he could go toe to toe with an Ascended, or one on the weaker side at least.
At the very least I think he would be able to manage a good fight
https://cdn.discordapp.com/attachments/457316449594245150/617378421156216833/a37_4.jpg He didn't go toe to toe with an Ascended, he needed the help of the Kohari, which were the high elites of Icathia, and they had to topple down HALF A FUCKING MOUNTAIN just to incap the Ascended. An Ascended would murder-shitstomp Jax in a 1v1
Im gonna have to say no. While yes, Jax is a very experienced and strong fighter, he is not at Ascended level. I'd say he's a mortal, but he did live for over 3000 years so idek what he really is. The Ascended have more than just experience behind them, they also have their crazy strong bodies full of magic from the Sun Disk, which is something that cant be learned no matter how long you train for. Could Jax kill another Ascended? Maybe, provided that he is given the resources to do so, he could likely coordinate an attack that would end up killing one, as he has done this before, but 1v1 is just out of the question.
Isn't it the same Jax that was thrilled to meet the Ascended in battlefield and called for fall back?
We don't even know what Ascended did he kill. Could be a weak one, and I assume it was, since I doubt he ever met an Aatrox/Renekton equivalent.
Prolly nah
