It is really difficult to kill someone that cannot die. Undying rage needs limitations.
There is no cast time.
You give him Fury stacks.
There is no limitation.
It works really well with his other abilities, which is not a problem except that he cannot die.
You ignore a mechanics of the game called dying, the only consequence people think about.
You could have all the Crowd Control in the world, chances are it has a cooldown that you used it to trap him: He can activate Undying Rage while affected by Crowd Control. What reason could you possibly have for not nerfing Tryndamere, considering you are on even playing grounds?
Do not forget Runes, and literally how his other abilities work.
If two even skilled players fight, you are fucked if he gets close and he can twirl through walls.
Give him a channel or wind or make him consume stacks, or something.
The shit needs to be toned down a bit.
When built full ad at late game this character with his 5s invincibility reduces teams of any strength to nothingness. To combat the idiocy of this character, like many other nerfs, we should reduce the ending length of invincibility on such a massive damage outputter to 3s at MOST. otherwise all assassins are worthless. Unless of course the point of the game is just to make rediculously overpowered characters in which case i can think of quite a few champs that need 5s of invulnerability. Sincerely a player who is tired of losing to the garbage of league.