Hello. This is my first guide here so hope you enjoy this.
In latest patch Tryndamere was nerfed but i have an idea how to make this char stil viable.

Now something about playstyle.
Early game is the hardest part for Trynds- you just need to survive, lasthit minions and try to get some kills. Mid game start about 5-6lvl when you get boots and zeal, these will give you a nice moving speed compared with Mocking Shout will grant you kills. When reached 6lvl u should kill 1guy every ulti usage.
Late game is really cool for Trynds. With this guide you will crit for 1k+ with 50% lifesteal.

Pros:
+AoE debuff and slow
+Great endgame dps
+Good healing
+Good escape mechanism( Spinning Slash) with possibillity to go through walls

Cons:
-Item dependable
-Squishy early game
-Vurneable for blinds, stuns and Dots.
-Needs many time to master

Battle Fury-Tryndamere gains 5 Fury for striking a unit or 10 Fury for a critical strike, and 10 extra Fury for killing a unit.

Each point of Fury grants +.35% Critical Chance.

Simple - 100fury grant 35% Critical Chance. ALWAYS try to get into battle with 100fury use it for Bloodlust when neccesary.


Bloodlust - Passive: Tryndamere thirsts for blood, gaining 5 / 10 / 15 / 20 / 25 Attack Damage plus 0.15 / 0.2 / 0.25 / 0.3 / 0.35 per 1% Health missing.

Active: Tryndamere consumes his Fury, restoring 30 / 40 / 50 / 60 / 70 Health (+150% of ability power), plus 0.5 / 0.95 / 1.4 / 1.85 / 2.3 Health per Fury consumed.

Max it first. It's your main abillity, gives you healing and attack damage, less hp more dmg this means youre like truck on Undying Rage usage.


Mocking Shout- Decreases surrounding champions' physical damage by 20 / 40 / 60 / 80 / 100, and enemies with their backs turned also have their movement speed slowed by 30 / 37.5 / 45 / 52.5 / 60%. Lasts 4 seconds.

Debuff AD and slow in 1 abillity - use it every fight, when chasing, in teamfights(debuff).


Spinning Slash- Active: Tryndamere spins through his enemies, dealing 60 / 90 / 120 / 150 / 180 (+100% of ability power) (+100% of attack damage) physical damage to enemies in his path. Spinning Slash's cooldown is reduced by 2 seconds whenever Tryndamere critically strikes.

Not as great as you think. It scales only with your bonus attack damage. It will hit around 400 so half of your white damage. BUT it's grreat escape mechanism it adds about 150movement speed during spin and with this you can go through walls.


Undying Rage- Tryndamere becomes completely immune to death for 5 seconds, refusing to be reduced below 1 Health and instantly gaining 50 / 75 / 100 Fury.

You want to be immortal? OK, so here's Undying Rage. It grants you 5sec immortality and some fury. It's your bread'n'butter, that's why you're Tryndamere. This skill makes you a real killer. Use it every fight if cooldown ready- for killing guys or escaping.

For summoner spells i use Flash and Exhaust.
It's the best spell setup, you can use them both offensively of defensively.
Other options are Ignite for DoT if someone is trying to escape or Heal for those who are not confident.

Greater Mark of Desolation
Greater Seal of Critical Damage
Greater Glyph of Scaling Cooldown Reduction
Greater Quintessence of Desolation

Armor Penetration, Critical Damage and Cooldown Reduction/lvl these will give you a nice dmg output. CdRed/lvl runes compared with Ionian Boots of Lucidity will give you a ~25% cooldown reduct so Bloodlust will be 9.6sec cooldown.

Standard 21/9/0

CORE BUILD:

GAME START

You start with Brawler's Gloves and 2x Health Potion.
Critical from your passive and gloves will keep you on full health using Bloodlust.
You need to stay on lane until level 6 then recall and buy Ionian Boots of Lucidity] if you dont died and killed someone you should also complete or [[Zeal if not still it's good. If you couldn't buy even boots - you had done something wrong...

At this point start your Mid game, you have enough speed to start killing. Use your Spinning Slash to go into fight > Mocking Shout and Bloodlust when needed. When dying use Undying Rage to finish the enemy or escape.

Your next step is to complete your first Phantom Dancer - this grant huge attack speed also crit and movement.
Now you need to buy Infinity Edge in order: Cloak of Agillity and rest.
With Crit dmg runes you have 267Crit Damage so you hit BIG.
In this point you completed the build, all other items are just extras.
Now you need to buy Vampiric Scepter this little lifesteal will grant you huge amount of life with your crits.
Then you need to complete second Phantom Dancer and next item is Bloodthirster.
Now you have a choice if a team have a high-armor champs buy Black Cleaver if not second Bloodthirster





Thanks for reading, please rate and comment.
Greeting-Pafker.