So what is Udyr?

He's secretly Bear Grylls made into a champion, he can survive anything, kill anything, and will even drink his own urine just to smash the enemy team.

He's a dude who wears a bear skin on his head. That's pretty much it.

He can get around well enough to access the back line and really wreck them when he gets there, but he isn't super tanky while also lacking the burst of an assassin. That space is sort of vaguely defined as "Divers" like Shyvana, Aatrox, Irelia, Xin Zhao, and others. Usually they have a dash of some kind that lets them gapclose but I think Udyr's passive and bear stance give him enough movespeed to overcome that.

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Imo he seems pretty op atm, and im not sure what exactly classifies him. Is he juggernaut? Is that how he gets all that damage? o.o

"all that damage"?

Huh? Sure, he has sustained dps, but he's completely melee with only movespeed as a gap-closer. He doesn't even have percent hp coughshyvannacough

He's half-man, half-bear, half-pig.