Master of Metal
If you've Impaled an Enemy Recently, you
and nearby Allies have +1000 to Armour
You and nearby Allies deal 6 to 12 added Physical Damage for
each Impale on Enemy 
Master of Metal is a notable Ascendancy passive skill for the Champion. It causes Impale to last 1 additional hit, 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.