This is my first build ever on mobafire but I do constantly make my own builds when I play admittedly they don't all work but I can assure you this one will work if used correctly.

Essentially all you need to know is how this all works so well together. Mundo's 'E' is an auto attack reset along with Titanic's active. Both which will practically fill your fervor stacks on your masteries. Then you will surely take enough damage to proc Sterak's Gage in which is when you may ult if you like but also gives a huge shield and a big damage boost too. All while you have your Q and frozen mallet autos to keep them in your range.

All in all this mundo build is possible to be beat just like any other build in this game just I have not found any weaknesses when you get full build if you build that situational item correctly. This build should blow up squishes and out last any tank sustain fight. You end out just about as tanky as any other mundo too health wise anyways ranging from 4k- 5k health dependent on the situational item.