Crushing blow A crushing blow is an attack made by an mob or NPC that is 150 % of the damage caused by a normal successful attack . A Player cannot perform a crushing blow ( unless under Mind Control , in which case they are treated as mobs ) . Chance of a crushing blow occurring . When the attacking mob is more than 4 levels above the target , there is a chance of being struck by a crushing blow . If the level difference is only 3 , which is common for players being attacked by " boss " mobs ( who are always treated as 3 levels higher than their attackers ) , then the player cannot be hit by a crushing blow . Important Note : As of patch 3 . 0 , the crushing blows mechanics have been changed . Now only mobs whose level is 4 or more above your level can deal Crushing Blows . However , this mechanic is based on a now - hidden quantity called the target ' s Defense Skill , which can be reduced by a few rare debuffs such as Unbalancing Strike . For every 5 points the target ' s Defense is reduced , it is considered 1 level lower for purposes of receiving Crushing Blows . The chance of being hit by a crushing blow is : where " Mob ' s Weapon Skill " is the mob ' s level * 5 , and " Player ' s level - capped Defense Skill " is the player ' s Defense skill ( normally the player ' s level * 5 ) . Unless you ' re under the effect of a debuff that reduces your Defense Skill , this means a mob 4 levels higher than you will have a 25 % Crushing Blow chance , and a mob 5 levels higher than you will have a 35 % Crushing Blow chance . Historical : Avoiding crushing blows from raid bosses . If your Defense skill is fully trained for your level , neither more Defense , nor Resilience , nor any other kind of bonus can reduce the nominal chance for you to receive a Crushing Blow . The only way to reduce your chance of receiving a Crushing Blow is for your combined chance to be missed , to dodge , to parry , and to block to be so high that the Crushing Blow chance is pushed off the bottom end of your attacker ' s Attack Table . Use the following formula to determine your miss / dodge / parry / block rate : % needed = Base 5 % miss + bonus miss from defense + dodge % + parry % + block % Remember to cast Holy Shield or Shield Block before checking your block chance ingame . Warriors . The ability increases block rate by 100 % , removing crushing blows from the miss / dodge / parry / block / crit / crushing - blow table that occurs when an opponent attacks , and making the warrior more or less " immune " to both crushing blows and critical hits in a PvE environment . This is because an attack that is block ed ( as with a shield ) cannot be a crushing blow or a critical hit - - the three are mutually - exclusive attack results . A warrior may be susceptible to crushing blows if they are hit 3 times in 5 seconds , as the ability has 2 charges . A mob with an attack speed of 2 . 0 or faster can therefore crush a warrior if he fails to dodge / parry / miss 3 attacks in a row . Paladins . The talent increased the block chance by 10 % ( used to be 30 % ) . Before it was removed , also increased the block chance by 30 % . However , Redoubt proc ' d randomly and could not be relied upon . The increases your block rate by 5 . 33 % while is active for a total of 35 . 33 % .