Master of Metal
and nearby Allies have +1000 to Armour
Impales you inflict last 2 additional Hits
20% chance to Impale Enemies on Hit with Attacks
You and nearby Allies deal 4 to 8 added Physical Damage for
each Impale on Enemy 
Master of Metal is a notable Ascendancy passive skill for the Champion. It grants a chance to Impale to attacks, causes Impale to last 2 additional hits, grants you and nearby allies armour if you've applied Impale on an enemy in the past 4 seconds, and grants added physical damage to attacks to you and nearby allies for each Impale on an enemy.