Damage block

Damage Block is a passive ability that gives the wielding unit a chance to block some physical damage from an attack.

Mechanics
Damage block has a chance to proc from attack damage, but not physical damage from abilities. Unlike armor, Damage Block will only reduce a set amount of damage, making it less useful over time. Damage Block will also occur before any armor reductions.

All items that use Damage Block mechanics use pseudo-random distribution.

Damage Block items will also block different amounts depending on whether the user is melee or ranged. The Poor Man's Shield will also have a reduced chance to proc from non-hero damage.




 * is considered general damage multiplier in the formula.
 * Quell of and  only increase base damage and that granted by the primary attributes.

Stacking
Only one instance of Damage Block can proc at a time. When multiple sources of damage block are present, the source with the highest possible damage reduction is checked first, and only if it does not proc will any others roll. In other words, when two sources of Damage Block have the same chance to proc, the one that blocks more damage will take priority. While the damage from multiple damage block sources do not stack, the % chance stacks multiplicatively. Such as, having two stout shields, the chance of blocking damage becomes (60 + 60*0.4)%, effectively having a 84% chance to block 20/10 damage.

Sources of Damage Block

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