Hello fellow summoners this is a tanking item build guide to the champion Leona. A few things to establish is that with this guid you will be able to fearlessly iniate survive and assist in the montage of cc's.
Secondly before anyone says anything I would like to just make it clear that this is just a item build and explanation. This means that you will not dominate every game without fail, but it will definitley help you concentrate more on your gameplay rather than worrying about what your next item will be.
Pros vs Cons.
Pros :

Bulky can take hits
By taking hits you dish out damage
You can easly range iniate with ult
Charge/Stun CC

Cons:

Don't do alot of damage

Well my pros out way my cons.

I can not stress Enough How important propper team work can either make or break you when aqquiring your items and knocking down turrets. Your priority is your team mates over your own kills dont be afraid to die to keep your carry alive long enough to wipe out the enemy team.

With the selected runes here you will be able to face check and iniate the first blood easily. Now it might not always happen depending on the team make up but if falls apon you to make sure it happens you will be equiped to do so.

My version of the 0/21/9 build is a mix of a tank hp/mana regen build that will allow you to spam abilities with out having to monitor your mana. In doing so this will allow you to have more time to focus on lane control and assisting kills.

In summary of what has been presented to you this is just a decent item build that I have found verry fun to play with and great to try out for new leona players. Hope you have as much fun using it as I did.