The Weapon Level is an indication of the die roll necessary to defeat an attack by a weapon. It is also the minimum number of defense necessary to counteract the weapon. Lucky clover subtract their level from the weapon level, so if a level 7 weapon attacked a bunny with the Triple Lucky Clover (a level 3 clover) it effectively becomes a level 4 (7 minus 3) weapon.
Weapon levels 01 - 12 are defended with a 12-sided die (usually the black one) while weapon levels 13 - 20 are defended with the clear 20-sided die. If clover comes into play when a level 13 - 20 weapon attacks, its effective level may drop below 13 yet still be defended by the 20-sided die. Roll-o-Lution also allows the 20-sided die to be used to defend against a weapon that would usually be defended with a 12-sided die.
Probability of SurvivalEdit
Until the Violet Booster Deck adds the 20-sided clear die, all weapons call for rolling a 12-sided die, with 12 equal-probability roll values. Based on that, the probability of surviving any effective weapon level (weapon level minus clover level) can be determined by subtracting the effective weapon level from 12 and then dividing the result by 12. Here are the probabilities of surviving weapon levels when rolling a 12-sided die:
With 20-sided dieEdit
Once the clear 20-sided die is added, weapon levels 13 - 20 are added and are defended with the new die. The formula for survival probability now changes the 12s to 20s. With Roll-o-Lution or the right level of clover, effective weapon levels 01 - 12 may also be defended using the 20-sided die. Here are the survival probabilities when defending with the 20-sided die:
The 7th Whisk is a level 01 weapon that attacks 7 times. Roll-o-Lution can only replace one of its defense rolls with the clear 20-sided die, which ends up making very little difference. It’s probability of survival is 54.39% or 56.36% with Roll-o-Lution, putting it between effective weapon level 05 and 06.
So what’s easiest to survive? Here’s all the possibilities ordered by survival probability (jump to the bottom to find the most effective killers):