Trait: Enhanced Sheltron
Sheltron adds 1 stack of Brace. Reduce cool down to 1.5 seconds. Stops auto-attacks. Brace will block the next physical or magical attack. Each additional stack of Brace adds 2.5% block strength for a maximum of 4 stacks. On successful block, will get equivalent stack of a debuff Shield Fatigue. Each stack of Shield Fatigue equate to 30 seconds of not being able to reuse Sheltron.

Shield Fatigue I, cannot use Sheltron for 30 seconds.
Shield Fatigue II, cannot use Shelron for 60 seconds.
Shield Fatigue III, cannot use Shelron for 90 seconds.
Shield Fatigue IV, cannot use Shelron for 120 seconds.