Editing Warhammer 40,000/8th Edition Tactics (section)

====Inflicting Damage====
When a model fails its saving throw it takes a number of damage depending on the Damage characteristic of the weapon used. The model suffers that many wounds and any excess wounds are lost. 

Feel No Pain "FNP" style abilities allow models to ignore some of the damage they take on by rolling a dice and beating a number, these rules are exclusive meaning you have to use the best one available but you can use it in addition to your normal saving throw.

Roll a die each time a model with this rule suffers a wound or mortal wound. On a roll of 6, ignore it.
*Sometimes, the roll is a 5.
*A 6+ FNP increases the average number of wounds you need to deal to a model to kill it by 6/5 or 20%. The chance that it will completely nullify an unsaved wound is 1/46656‬ for 6 damage, 1/7776 for 5 damage, 1/1296 for 4 damage, 1/216 for 3 damage, 1/36 for 2 damage and 1/6 for 1 damage. 
*A 5+ FNP increases the average number of wounds you need to deal to a model to kill it by 6/4 or 50%. The chance that it will completely nullify an unsaved wound is 1/729 for 6 damage, 1/243 for 5 damage, 1/81 for 4 damage, 1/27 for 3 damage, 1/9 for 2 damage and 1/3 for 1 damage.