Some heroes such as Clinkz or Outworld Devourer can use auto-cast abilities that add damage to your hero's auto attack,
My question is: does this extra damage count as physical or magical damage?
For example, Clinkz's Searing Arrows add 20 bonus damage at level 1. If your hero's auto attack damage is 50, then are you doing 70 physical damage, or 50 physical damage and 20 magic damage?
Just want to know for the purposes of armour against people like this.