Volcanic Rupture is an excellent skill to disrupt enemy team formations, anticipate where your enemies are positioning and break up their combos with this.
LoL Ornn players will likely find him to be a complex character to build out properly. You'll see that his build is modified when he is fighting either diversified or homogenous team compositions, demonstrating you should not follow the same Ornn build every game of League of Legends
The most important items to include in your champ's build are: Sunfire Aegis, Warmog's Armor, and Frozen Heart. Those who included these items in their gear had a greater win rate than players who utilized other builds for Ornn. Similarly, if you are trying to beat a varied enemy team comp, you should really consider grabbing yourself the Resolve, and Precision runes. In recent matches, he won the largest percentage of his rounds when equipped with these runes.
We came up with our Ornn build guidance by analyzing 55,618 recently ranked League matches with him in them. We only recommend the top winrate Ornn builds that have been built by ranked players enough times for us to propose them. With so many games in our data, we are quite confident in our suggested builds.