Random Dice Durations For Spells & Abilties

When you cast a spell or use an ability you have to manually roll the 1d4, 1d6 ect. to set the duration of an effect. By adding the ability to code a spell 1d4rd instead of it being just a numerical value and have to roll it manually, it instead will roll the 1d4 behind t anhe scened apply the duration as rolled. Or add the ability to to atleast add an effect to the the spell when applied like Stunned; AC: -4; [D: 1d4]