Command of the Elements
40% increased Defences from Equipped Shield
6% increased Attack Speed while holding a Shield
24% increased Elemental Damage with Attack Skills 
Command of the Elements is a notable passive skill that grants increased attack speed while holding a shield and additional elemental penetration with weapons. It also grants increased elemental damage with attack skills, as well as increased defences (armour rating, evasion rating and energy shield) from equipped shields.