I was one of two engineers on Sylas, a uniquely challenging character for League with the core mechanics of copying ultimates from other characters. This required refactoring many systems and scripts in the game to support spell copying, and a much larger “working group” than usual as we needed designers of other characters to weigh in on how certain interactions would work, such as stealing ultimates with passive interactions, or ultimates that transform the character (e.g. Nidalee).