Complex sentence: Superior Derptactics is a North American editor that created this account specifically to edit pages regarding League of Legends, a game that the user knows very well and would like to contribute to its Wikipedia pages, which seem to lack a lot of vital information.
Split into simpler sentences: Superior Derptactics is a North American editor that created this account specifically to edit pages regarding League of Legends, a game that the user knows very well. She would like to contribute to these Wikipedia pages, which seem to lack a lot of vital information.