User blog comment:Emptylord/Champion reworks/Sion the Nearly-Headless Axeman/@comment-24385282-20140511015613

Sion gains 1 movement speed for every 5 points of physical damage he resists through armor, Feel No Pain or Intervention.

What about regular shields? They still negate/allow Sion to resist at least 5 points of damage, which gives him the chance to resist 5 points of physical damage.