Returns the percentage of damage blocked by your shield.
damageReduction = GetShieldBlock()
Returns
- damageReduction
- number - the percentage of damage reduced your shield
Example
/dump GetShieldBlock() [0]=31
This means that your shield blocks 31% of damage. This matches the in-game tooltip:
"Your block stops 31% of incoming damage."
Notes
All blocked attacks are reduced by 30%. It can be increased to 31% by a +1% Shield Block Value meta-gem. (e.g. 
[Eternal Shadowspirit Diamond])
