This build is a tanker build, and when Leona have the right gear and right skills, nobody can stop her. Not even the kitchen...

passive: leona's abilities mark target with sunligh. allied who attack the target with the mark deal additionali damage and consume the mark.
Q: Leona charge her shield with sun, next auto attack deals damage and stun the target.
W: when acctivated Leona gain a shield for 3 second, when the 3 sedond is finished the shield blows up, and enemies around take damage, if it hits a target, she got the shield for 3 more seconds.
E: throw sword of sunlight damageing all targets in a lane, leona teleports to last champion attacked.
R: Leona calls down a beam of sunlight dealing damage to all enemies inside, and slowing targets inside it. if the target is in the middle, the target get stunned for some time.

Leona is a tanker so you got to start the fight. start the fight with-->-->(fast)and just spam the W whenever the spell is ready. Leona can also go out from fight with E forexample if you see one person alone, use E and you are out!

(if you gotready use it on the ned of comobo)

pros:

good tanker

good damage output if right build

can change the whole game

stun, and slowing spells

cons:

not very good at farming

cant solo lane

she's a woman -.-

For runes i choose Health marks, magic ressitance, armor glyphs and armor quintessence. this is my runes, and you can yourself pick some others if you like.

i choose the 0/29/9 masterise, but if u want to have some more mana, and so on, you can choose 0/9/21, but i recommend 0/21/9 for leona...

Its very good to have Leona on the team, because she can stun, slow, and teleport to target, but without the team shes nothing... When you are Leona do not try to get kills, try to give the kill to the team

here is some picturres of leona that i like ;)