Thanks to Ornn's K/D/A and utility, he has a fairly average overall win rate. He does very well in the mid game, with a winrate of 52.7% in that phase. Unfortunately, he does poorest in the early game, where Ornn's win rate is 46.1%., The difference between his best and worst game phases is a large 6.6%. This large difference indicates that his power spikes and wanes in different parts of the round. Prepare accordingly.
In the current meta, Ornn is somewhat popular. He has been selected in 3.9% of recently ranked matches. Hardly anyone sees him as a danger. He has only been banned in about 0.9% of League of Legends games.
You will find him typically laning in the top position. The highest win rate position for Ornn is top (50,1%). Currently, Ornn's meta game is centered around tanking. Specifically, his kit should primarily be centered around protecting carries. Additionally, he is a pretty good physical damage dealer champion. Dealing magical damage is the least significant part of Ornn’s playstyle.
If you are not comfortable with his skills and tactics, you may find it difficult trying him out for the first time. Most players believe him to not be a difficult champion to pick up. Ornn primarily does magic damage (66% of his total damage). He also deals a large amount of physical damage.
Ornn deals a good amount of damage in a normal match (17.983 damage). You could focus on developing him as a damage dealing champion to destroy your opponents.
If you are looking for a dominating carry, then you should maybe consider this champ. He has one of the lowest kill counts on the Rift amongst all champs. Additionally, he has a fairly typical average champion death rate (4.8 deaths). Moreover, Ornn's KDA is typically high with an average KDA ratio of 2.4 as well as 7.8 assists per match.