Ok this is my first build so plz don't flame at me for making some little mistakes or something and if you would like to leave some suggestions feel free to do so ^^

Ok this is just small update/change to the build it just changes the starting item fromBoots of Speed toDoran's Blade and changed that 1 point in Offense Masteries fromto

Ok im gona explain why u should choose these items and in this order.

Doran's Blade,Doran's Shield orDoran's Ring is the best staring item almost for any champion I would recommendDoran's Blade because Tryndamere does NOT need Healt or Mana regen due to the fact that he doesn't use mana and he can heal him self with hes Q this is why I would recommend starting withDoran's Blade. For bootsBerserker Greaves is and obvious so I probably wont even have to bother to tell you why.

Now here's were it starts getting fun after managing to buildThe Bloodthirster u can pretty much pwn any champion 1 vs 1 at some times even 1 vs 2. If every lane is pushing fine at that time I would recommend you go jungle a bit and at least get your self theBlessing of the Lizard Elder fromLizard Elder

Ok from this point your Tryndamere will just become more powerful and more OP

Now after managing to build aThe Bloodthirster you should buildZeal and from thatPhantom Dances then buyB.F Sword and buildInfinity Edge. At this point you can sell yourDoran's Blade after that you should build anotherThe Bloodthirster andPhantom Dances. If the game is still going on after that and you have a lot of spare money I would recommend you sell yourBerserkers Greaves and buy anotherPhantom Dances

If Mordekaiser happens to be in the game I recommend replacing 1 of thePhantom Dancers with aLast Whisper

Main Rune Book
Greater Mark of Malice
Greater Seal of Malice
Greater Glyph of Focus
Greater Quint of Furor

As for summoners spells for Tryndamere I would recommend.


Ghost

Your Champion ignores unit collision and moves 27% faster for 10 seconds.

and


Exhaust

Reduces a target's Attack Damage by 70%, Ability/Item damage by 35% and slows its Movement Speed by 40% for 3 seconds.
Cast range: 500 (estimate)

Ok this is my build but if you still need more info/guide on how you can play Tryndamere I would recommend you check out Apotheosis Awesome Tryndamere Build & Guide