Blizzard Entertainment has updated StarCraft 2: Legacy of the Void‘s co-op component with some significant new features.
These include mutators and mastery levels.
A Mutator Challenge event will be offered each week and players are invited to share their ideas for mutators and challenges.
You can then have these bonuses for all commanders, leading to better combat effectiveness during co-op missions and an edge while tackling the Mutator Challenges.