A deeper look in Jax's lore
A little more description on Jax: Before the Icathian war against the void,
is likely to be human, " the beating heart of the Kohari, a shaven-headed giant with skin pockmarked by the ravages of a childhood illness, and a forked beard stiffened to points with wax and white chalk." Kohari is a group of fighting mage. This explained why Jax's ability have magic damage. From the text, we can read that Jax was once the leader of this group, and also a "master of weapons". The weapon he used in the war against the Shurima God warriors (and eventually void creatures) was a "long, axe-headed polearm slung at his shoulder. The weapon was immense, its ebony haft carved with the names of his forebears, and the blade a slab of razor-edged bronze. Few of our group could even lift it, let along swing it, but Saijax was a master of weapons." Jax also has an impressive strength, described as "Saijax, slapping my back with one of his massive hands. Meant as a brotherly pat, it rattled the teeth in my skull". This helped explain why Jax's can beat people to unconscious with a brass lamppost. And at the ending of Where Icathia Once Stood, we can see that
people "hadn’t thought Saijax could bleed at all." Which means Jax's have a strong resolve even not in the fight, basically means he has his ultimate on all the time. Which is why it's simply named "Grandmaster's might". It's just he's a strong big dude. But that doesn't change the fact that Jax's is also quick and agility includes that he can leap to distance quietly (see cinematic A New Dawn), and he can dodge enemy's physical attack just because he's so experienced in battle and a master of almost all kind's of weapon, he could easily predict what the enemy is gonna do. Such as in None Shall Pass, "Jax swayed aside from the first blow, ducked the second and parried the third. He spun inside the swordsman's guard and hammered his elbow against the side of his helmet. The metal buckled and the man went down on one knee with a grunt of pain." Since Jax existed before Icathia was destroyed, we can tell that he's over a thousand years old now. It will not be surprising to see him be master at all weapons. Hell, he cut one of the god warrior's head off with his old weapon (see Where Icathia Once Stood, and for god warriors, see
and
). After the void entering runeterra, Jax's is likely to get void touched and turns into a purple, three-fingered, and two toes creature. With Shame, he covered himself with the robe he wears now. " His robes were heavy, but the sun's warmth didn't reach the mottled and oddly hued skin beneath. No part of his flesh was visible, which was probably just as well. He wasn't even sure what his skin looked like anymore. " He also wears a mask, possibly to cover the scar he got in the battle of Icathia. After the void destroyed Icathia, Jax's been looking for someone who is strong enough to stand beside him, which I suspected to be
, with her interaction with Jax and her lore.
Personality wise, Jax has a strong moral code, humor, merciful and respect his opponent. He can seem to cheer up new soldiers, telling jokes all the time, and "giving his opponents a feeling that they might have a chance", and with a biting sarcasm. "You seem like a man who can hew ironbirch trees all day and still have energy left for a tavern brawl" said Jax.
The man took a steadying breath and attacked again, a series of blisteringly fast cuts that went high and low, a mixture of sweeping slashes, lighting thrusts and overhead cuts. Jax parried them all, his lamppost in constant motion as it deflected the Demacian's blade and delivered stinging, bruising ripostes to the man's arms and legs. He feinted left and hooked his lamppost around the opponent's legs, putting him flat on his back. He jabbed the butt of his post into the man's belly, doubling him up and leaving him gasping for air.
"Had enough yet?" asked Jax. "I can swap hands if it makes it easier." With unquestionable strength and skills on close up combat, Jax is truly the Grandmaster At Arms. He drink with
, possibly to temporarily distract him from the memories of Icathia. And I personally believe that if Jax really wanted to,
would not stand a chance in their duel (HE CUT A GOD WARRIOR'S HEAD OFF). But Jax is a guy who seeks to sport with his opponent, so he might give Fiora a chance to win. ;) League hold him back by not letting him use a real weapon, not letting him use his E all the time (From the lore we can read that Jax's can keep using E if he wishes), and not letting him keep using his ult all the time. (Because after all, his ult's active is just letting him to fully use his resolve).
Also Jax loves eggs. "My mouth was dry, my heart hammered in my chest. I looked to Saijax for strength, to take courage from his indomitable presence. His jaw was set, his eyes hard. This was a soul who knew no fear, who rejected doubt and stood firm in the face of destiny.
Sensing my gaze, he glanced down at me. “Egg?” he said.
A pair of peeled eggs lay in the palm of his hand." - Before Jax and Icathia army entering a outnumberd fight against Shurima and God Warriors.