I've been playing League since Open Beta and just realized (to be honest I realized this some weeks ago but I can't live with realizing it almost 15 years later) what the joke about Angler Jax is.
I always just assumed it was some random thought of Riot to give him the Angler skin and him being able to fish in the river (even though this feature was added rather recently)
In his joke he states "Imagine if I had a real weapon" - always made sense in his old lore where he was some kind of weapon grandmaster and him having a real weapon would be too powerful and a fishing rod is an easy replacement for a lamp post without being a real weapon so I never thought about it as it was just a fun thing.
Just the other day it dawned on me that they doubled down and gave Jax a "reel weapon" and even though I don't know if that is the story behind it, this is the funniest thing to me.
Either I was always just stupid (and/or didn't know about the joke) or they never cared to explain.
tl;dr: Jax has a reel weapon with his Angler Jax skin
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