Just in short, it's my first build because Warwick is my main jungler, I think he isn't that strong as full AD so I made him a Debuffer. Hope you guys like this build, if you need help just post a comment and I will try to answer it.

Here are some scores I got with this Warwick build.

This is because your sustain in the ganking and the attack speed when you use your W is so insane that u rather die and u can get easy ace's in team fights.

These are some ways you can gank from:
1. Through the river and avoid the wards the enemy place.
2. from brushes in the lane.
3. TP to wards (If you use TP in jungle).
4. Come from the back (BACKSTAB POWER!).

Most players keep the Wriggle's Lantern lategame, but I like the Madred's Bloodrazor more because of the extra attack speed and the passive it has.

It's also possible to build a Warmog's Armor on Warwick if you want more Health, but I prefer the Frozen Mallet because it slows the enemy by every hit you give him, and its easy ganking this way.

I don't know how you guys like to play Warwick but I play him as a Tanky DPS Bruiser because his towerdives with his Ultimate are so OP then, and you can carry your team so easy this way.

I build Warwick this way, because the hes capable for the early level jungling, the only con is that he can't gank properly untill level 4, then you unlock his Blood Scent and you can last hit them easier.

I start Warwick jungle with a Long Sword and a Health Potion, and the skill Hunters Call, this is because Warwick's early jungling is pretty easy and you do tons off damage and still can jungle without a recall until 10:00min ingame.

I first max his Hungering Strike, because this is his main damage source, second skill I max is Hunters Calling because of the bonus attack speed you get, then ofcourse I max my ultimate ability because this always is needed, when I turn level 18 I max my Blood Scent because this skill isn't that usefull with this build because your already very fast, and if you get fed you get to the movement speed faster, so try to get the kills and you will be unstopable.

Pros and Cons:

Pros
+ One of the best junglers ingame
+ Great regeneration skills makes him quite tanky even without lifesteal.
+ Superb ganker. Apears from nowhere with a highly damaging long stun.
+ Best chaser ingame due to passive MS buff when the prey is under 50% life.
+ Extreme survival capabilities for a dps champ thanks to huge lifesteal
+ % based damage (Bloodrazor + Hungering Strike) will get even tanks down very fast

Cons
- Golem buff dependant early/mid game.
- Costy itemisation
- Stun/blind vurneable
- Easy to countergank in jungle
- Leaves 1 champion for 2v1 lane
- Quite team dependant (ganks and map/miss awareness).

These are Warwick's abilities:

Eternal Thirst (PASSIVE)

Each of Warwick's attacks will deal 3 / 3.5 / 4 / 4.5 / 5 / 5.5 / 6 / 6.5 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 additional magic damage and heal him for that same amount. Each successive attack against the same target will stack this amount of healing and damage up to a maximum of 3 stacks. The stacks remain for 4 seconds.

Hungering Strike (Q)

Strikes an enemy for the greater value between 75 / 125 / 175 / 225 / 275 (+100% of ability power) and 8 / 10 / 12 / 14 / 16 % of the target's maximum health, and heals Warwick for 80% of the damage dealt. Minions and monsters will only be dealt the flat magic damage.

Hunters Call (W)

Warwick lets out a howl that inspires all nearby allied champions. This increases Warwick's attack speed by 40 / 50 / 60 / 70 / 80 % and all nearby friendly champions' attack speed by half of the amount for 10 seconds.

Blood Scent (E)

Toggle: Warwick senses enemy champions under 50% life within a 1500 / 2300 / 3100 / 3900 / 4700 distance of him, revealing them until they heal. Upon sensing an enemy, he will gain 20 / 25 / 30 / 35 / 40 % movement speed.

Infinite Duress (R)

Warwick lunges at an enemy champion, suppressing the target for 1.8 seconds and striking for 50 / 67 / 84 (+0.4 per bonus attack damage) magic damage in 0.33-second intervals. Warwick gains 30% life steal for the duration, and is considered to have fully stacked Eternal Thirst against the target, which is removed at the end of the duration. Each of his strikes triggers on-hit effects and benefits from life steal and Eternal Thirst.

Info of items:

Wriggle's Lantern.

+23 Attack Damage +30 Armor +12% Life Steal UNIQUE Passive: Your basic attacks against minions and monsters have a 20% chance to deal 425 bonus magic damage. UNIQUE Active: Places an invisible Sight Ward that reveals the surrounding area for 3 minutes (3 minute cooldown). (Only usefull earlygame)

Mercury Threads.

+25 Magic Resist UNIQUE Passive: Enhanced Movement 2 (does not stack with other Boots) UNIQUE Passive: +35 Tenacity (Tenacity reduces the duration of stuns, slows, taunts, fears, silences, blinds and immobilizes. Does not stack with other Tenacity items.)

Wit's End.

+40% Attack Speed +30 Magic Resist UNIQUE Passive: Your basic attacks deal 42 bonus magic damage. UNIQUE Passive: Your basic attacks increase your Magic Resist by 5 for 5 seconds (effect stacks up to 4 times).

Frozen Mallet.

+700 Health +20 Attack Damage UNIQUE Passive: Your basic attacks slow your target's Movement Speed by 40% for 2.5 seconds (30% for ranged attacks).

Frozen Heart.

+99 Armor +500 Mana UNIQUE Passive: +20% Cooldown Reduction UNIQUE Aura: Reduces the Attack Speed of nearby enemies by 20%.

Force of Nature.

+76 Magic Resist +40 Health Regen per 5 seconds +8% Movement Speed UNIQUE Passive: Restores 1.75% of your maximum Health every 5 seconds.

Madred's Bloodrazor.

+40 Attack Damage +40% Attack Speed +25 Armor UNIQUE Passive: Your basic attacks deal bonus magic damage equal to 4% of the target's maximum Health.

I hope you guys liked my build, this is the first build I ever made, please leave a like, send it to your friends and I hope i will see all off you later, PS: WARWICK OWNS ALL OFF THE OTHER CHAMPIONS IN LEAGUE OF LEGENDS HUEHUEHUEHUE!