Darkmoon Card : Wrath < onlyinclude > < / onlyinclude > This is one of the four available Darkmoon Cards trinkets added with the Burning Crusade expansion . Obtaining the Trinket . Darkmoon Card : Wrath is obtained by gathering all eight of the Storms cards , creating the Storms Deck by right - clicking on any of the cards , and turning in the deck to the Darkmoon Faire . All the individual cards and the deck itself are BoE items . Cards 2 through 4 are world drops , 5 through 8 are world drops from elite mobs , and the Ace drops from end bosses in instances . Effects on Critical Strike Chance ( general ) . Using the following java program we ' re able to simulate what happens to our crit rating when we use this trinket : This simulates the behavior of the trinket after 1 . 000 . 000 strikes . The output is the following : With those results you should able to determine , considering your base chance to crit , if this trinket is a good choice for your character . Effects on Critical Strike Chance for Casters . The crit benefits of this trinket are affected by the chance of the player to have a streak of non - crit hits . These streaks are less likely for players who already have a high crit chance . Also , the trinket itself , by increasing crit chance , progressively makes long non - crit streaks less likely . Streaks of Non - Crits . In this example , resists will not be counted . A player with a 25 % crit rate will be assumed to have a 75 % non - crit hit rate . The probability that a series of non - crits of a certain length ( called a streak on this page ) occurring can be calculated by multiplying the non - crit hit rate to the power of its streak length . To clarify ; the streak is quantified by presuming event X + 1 is a critical . In other words : So with a 25 % crit rate , the probability of having a streak of 10 non - crits is 5 . 63 % . Although each cast has a 75 % of being non - crit , the percentages have a cumulative effect when looking specifically for a block ( or streak ) of 10 non - crits in a row . However , with the trinket , x in the above formula changes with each new non - crit in the streak , because the buff increases the crit rate cummulatively as the streak continues . The modified version this : The new Chance of Non - Crit Streak is equal to new Non - Crit Chance times the previous Chance of Non - Crit Streak . The blue * yellow = green numbers demonstrate this formula . As you can see , players with a 25 % crit rate will have a crit rate of 32 % if they have had 10 non - crits in a row , but the chance of having 10 non - crits in a row is only 3 . 5 % . To get an idea of how effective the trinket is , the number of extra crits contributed by the trinket for each scenario must be calculated and then added together . In the table above , we listed the chance of having a streak of at least X non - crits in a row . The table below breaks down the contribution of the trinket for each streak scenario . This contribution is calculated by multiplying the bonus critical of the trinket by the incidence of the streak . The incidence can be calculated from the above table by deducting the non - streak chance of X from the chance of X - 1 . For example , there is a 0 . 75 incidence of a non - critical , and the incidence of a second non - critical is 0 . 5567 ( these values are fractions of the total number of casts done . ) The fraction of streaks that end at 1 ( i . e . the second cast is a crit ) is 0 . 1933 , since the remainder ( 0 . 5567 ) had a second non - crit event . The final column is the product of this number and the increase in crit caused by the trinket , which tells us the fraction of streaks that ended because of the trinket . For example , a streak of 5 non - crits followed by one crit has a fraction of 0 . 0617 of all streaks , and the increase in crit from the Wrath trinket is 3 . 85 % . In other words , Wrath provided a 3 . 85 % increased chance to crit for 6 . 17 % of crit events . The table above shows the first 11 ( and most likely ) occurrences : that you have a streak of non - crits of length zero , a streak of length 1 , a streak of length 2 , etc . Adding their fractions together , these 11 possibilities summarises 97 . 65 % of all cases ( the remaining cases are streaks longer than 10 ) . If we then add up the fractions of crits caused by the trinket , the wrath trinket increases the incidence of crits by 1 . 85 % of all casts . The real figure is higher than this , but this is pretty close since streaks above 10 are unlikely , and its contribution soon becomes insignificant ( if you go to 20 , you cover 99 . 977 % of the streaks and an increase of 2 . 0857 % ; at 29 it is 99 . 9998 % of cases and an increase of 2 . 0892 % ) . The table above was calculated for someone who had a base crit rate of 25 % ( i . e . excluding contributions by the trinket . ) If we convert the summed incidence of crits caused by the trinket and convert it to an equivalent critical strike rating , we get the approximate values below ( to 20 iterations ) . As your base crit rate increases , the value of this trinket decreases , but it is a very valuable trinket at lower rates . For those who are comparing various trinkets , this trinket has a critical rating of exactly 40 ( the equivalent of , without the very useful temporary health bonus , or without the potential increase in spell damage ) at a base critical rate of 28 . 13 % . It also has a critical rating of exactly 32 ( like the spell critical bonus of , for example ) at a base critical rate of 33 . 32 % . The sections below will be of interest to players concerned about long streaks of non - crits ( perhaps warlocks trying to keep up Improved Shadowbolt procs ) . Rating the effect of the trinket . The significant effect of the trinket is in how it decreases the Chance of Non - Crit Streak . You can think of Chance of Non - Crit Streak as the opposite of crit chance over a given number of casts . For example , in the above chart , there is a 10 . 71 % chance for a streak of 7 non - crits . That also means that there is a 89 . 29 % chance that the streak will fail , that any one cast out of a block of 7 will crit . However , without the effect of the trinket , the streak chance is 13 . 35 % for 7 casts . Without the trinket , there is an 86 . 65 % chance the streak will fail . So the trinket has increased the chance of at least one crit in any seven casts by 2 . 64 % . Even though the 7 charges would add 5 . 38 % crit chance to the next cast , the unlikelihood of getting 7 non - crits in a row balances that out . This includes the cumulative effect of the base crit rate and the trinket ' s increasing charges . In other words , the effect of the trinket can be expressed in terms of the difference between the likelihood of non - crit streaks with and without the trinket . The following graph shows net crit chance increase caused by the trinket over a number of casts for players with different amounts of base crit . So , as an example from the graph , a player with a base crit rate of 15 % will be about 6 % less likely to have a string of 14 non - crits due to the trinket . That is to say , he will be 6 % more likely to have any one cast crit out of a block of 14 . As you can see , the more base crit you have , the less benefit you get from the trinket , because the likelihood of long strings of non - crits is so low . Also , as you consider longer and longer streaks , the net benefit of the trinket actually begins to decrease . This is because the chance of one crit in say 18 or 20 casts is so high that any amount of crit increase is insignificant . Summary . Since Darkmoon Card : Wrath increases a player ' s crit rate only while the player is not critting , it is reducing its chance to build charges while building charges . So even though at 7 charges the trinket increases crit rate by 5 . 38 % , we have to balance that with the increasing unlikelihood that the player will have 7 non - crits in a row , an unlikelihood affected by base crit plus added crit from the trinket . Instead of looking flatly at crit increase , we can look at the difference in likelihood of non - crit streaks between streaks affected by the trinket and streaks with only base crit . The difference in these is the increased chance that any one cast across the streak will crit . Interestingly , we found that the benefit of the trinket maxes out at a certain point , and that longer streaks of non - crits are so unlikely that the trinket adds little to the cumulative effect of the base crit rate . Using this difference as a yardstick for the trinket ' s effect , here are some results for various base crit rates : Simulation . A simple script that runs simulations of stacking Wrath buffs for casters , and computes the effective crit increase , can be found here .