As a result of Karthus's K/D/A and utility, he has a somewhat poor overall win rate. He does best in the late game, with a winrate of 54.4% in that phase. Unfortunately, he does terribly in the early game, where Karthus's win rate is 45.1%., The difference between his best and worst game phases is a large 9.3%. This sizeable difference shows us that his power spikes and wanes in different parts of the game. Prepare accordingly.
In the current meta, Karthus is not very popular. He has been used in only 2.7% of recently ranked matches. He is rarely banned during champ select. Obviously, very few players see him as a huge threat. In recent ranked matches, Karthus was banned 1.6% of the time.
Karthus is played mostly in the jungle position. This occurs in 62,1% of his rounds. Yet, jungle Karthus has the highest win rate (48,3%) of all positions but is less popular of a position (played 18,8% of the time). At this time, Karthus's meta game is focused on dealing damage. Specifically, his build should primarily be centered around magical damage. Dealing physical damage is the least critical part of Karthus’s kit.
If you are not used to his skills and gameplay, you may find it difficult picking him up for the first time. Many competitors consider him to be a challenging champion to master. Karthus mostly deals magic damage (91% of his total damage). He doesn't deal much of other damage types and should not be played as hybrid damage dealer..
Karthus deals a great deal of damage during a normal game (31.095 damage). You should focus on building him as a powerful champion to crush your foes.
He is a powerful damage dealer on the Rift with 7 kills on average each round. That is one of the highest kill counts among all jungles. Additionally, he has a relatively high average champion death count (7.4 deaths). Additionally, Karthus has an average KDA ratio (2.2) with 9.6 assists.