Hi people,
Mundo is AWESOME!! He's purple!!
This is my way of making Mundo a tank, I hope you like it and maybee use it.

As summoner spells I chose
Ghost : when you are in a very ****py situation you might be able too use ur ulti and ghost and I don't think they will catch you when you are running.

Exhaust : when you are in a team fight you are (9 out of 10 times) the first to run into the enemy (don't be sad if you get killed that's the tank job) and exhaust the player you and your team will focus first.

I always start with a Ruby Cristal especially in 3v3, it will give you the boost to help your team get first blood, make a Warmog's Armor with it. If you are on lane with someone who's getting all last hits on minnions you should make a Heart of Gold to get your gold.
when you got enemy's that got use a lot of traps en stuns and stuff you should get yourself Mercury's Treads, otherwise you should pick Boots of Swiftness or Boots of mobility.
After that you buy Spirit Visage becuzz of the 20% extra health regen.
Force of Nature is for extra health regen and the magic resist.
I buy Frozen Mallet for extra damage, health and for the slow. (when you got allot of AD against you you should buy Thornmail, for the armor and the 30% damge they will get back.
And at last Guardian Angel for fake death.

Just be good for Mundo! Play Video
(sorry for bad english..)

ONE LOVE!