Command

The Command attribute reflects an paragon's skill when protecting allies. This is not a primary attribute and may be used by secondary paragons.

Guild Wars Description
No inherent effect. Many Paragon skills, especially those that protect your allies or increase your tactical position on the battlefield, become more effective with higher Command.

Associated skills
Many Command skills relate to inflicting or preventing damage. Anthem of Guidance, which prevents Blocking, and Song of Concentration, which prevents interruption, are also Command skills.