Build Guide by estyler2k
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Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This build works wonders, especially with Kennen's AP ratio buff in one of the recent patches.
Very high burst damage
Ult is extremely deadly in team fights
Not only takes down squishy champs like butter but can hit tanks quite hard with recommended magic pen
Decent survivability with 09/21/0 build.
Not able to utilize stun as much as AS build
Requires player to be able to aim well with shuriken
Targeted a lot, but if played right really shouldn't have much of a problem.
Vulnerable when skills are on cool down.
Magic Pen: Magic pen is more beneficial in most cases than flat AP. Play against a team that starts stacking magic resist and you'll see this very quickly. If you do the math you'll find that magic pen actually ends up doing more damage in the long run. With Mejal's and the recommended build you shouldn't have any problem obtaining a high amount of AP later in the game and with magic pen you'll find even tanks can be hit like a truck.
Dodge: Adds to your already existing survivability with the 09/21/0 build greatly. As a champ that uses energy, we have the benefit of not having to worry about mp5 runes.
Doran's Shield: I recommend for extra laning power in the beginning, but if you feel extra confident you can go straight for an amplifying tome + health pot for Mejals.
Mejal's Soulstealer: You will want to get this as early as possible as you will not want to miss out on stacks from early game kills and assists. Also starts adding to your immediate AP.
Sorcerer's Shoes: Adds to your already high amount of magic pen. Many people decide to go with either Boots of Swiftness or Mercury's boots, but with Kennen's Lightning Rush and Flash being recommended, I don't feel either is necessary.
Rylai's Crystal Scepter: This is when you really start to shine if not already. By now you should have at least a few stacks and now you are adding flat ap along with the ability to slow on spell hit. Also adds extra health for increased survivability.
Zhonya's Ring: Crazy AP boost and awesome active. Nothing more to say.
Lich Bane: Since Kennen is frequently chaining his Shuriken and Lightning Rush with electrical surge you'll find a large increase in burst damage. The flat AP, movement speed, and magic resist are extra goodness.
Lastly I recommend Guardian Angel: At this point in the game you should already be putting out a significant amount of damage, so you may as well add to your survival. "OMG WE FINALLY GOT KENNEN, OH WAIT. HE'S ALIVE!?" *ULT+SHURIKEN+ELECTRICAL SURGE TO THE FACE*
Flash: This has helped me escape death countless times, and also allows me to finish off people who might otherwise have gotten away.
Ignite: Sort of self explanatory. Great for finishing off people with low health and simply adding extra damage for free.
SKILLS: This build is for people who actually know how to use Kennen, otherwise no build will help you.
CONCLUSION: I've tried several different approaches with Kennen. Hybrid, AS, you name it. None of them have been able to compete with how quickly I can dominate champions with this build. With the ratio's improved for AP, it just doesn't make sense anymore to play him any other way.