As a result, the armor stat does not lose its long-term effectiveness as a match progresses. It is a scaling stat that starts out relatively small and builds throughout the game. Lethality works as a booster to flat armor penetration. Image via gamepedia How to calculate Lethality There are other items, such as Black Cleaver, that reduce armor for everyone in a team. Its effect is, however, restricted to a single champion and not the entire team. It somehow provides a boost to the champion's physical damage, resulting in a heavy reduction in the opponent's armor effectiveness.
Lethality works by reducing the opponent’s armor while dealing damage. How does Lethality work in League of Legends? Image via Riot Games - League of Legends However, it is an 'effective reduction' and not a true reduction in armor. It reduces the amount of armor an opponent has when attacked.
This stat is extremely useful for AD champions as it allows them to deal heavy damage to enemies. Yep, lethality in 2017 is broken :D - uSpotGaming February 24, 2017
