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.
Basically this build is a Beast HP JUICE HEAD CHO'GATH. Hes invinncible, unstoppable, and unkillable. His Hp is insane when he reaches lvl 18, stacks up Leviathon points and has Devoured 6 unfortunate ememies. 7329.64hp(base hp at lvl 18) + 640hp(leviathon stack) + 900hp(eat 6 people) = 9K HP!!!!
Cho'Gath can also solo turrets, which is a great way to get inside the base and take out turrrets to change the tide of games.
Have fun and enjoy the Build.