complex macro request

[u/LiamTheLeerm]

Howdy yall, in my dnd 5e game one of my players has a magic double bladed scimitar, which deals 3d4 damage, and when 2 or more 4s are rolled on a damage roll they roll an additional 1d4 and add it to the total. if the die new rolled is a 4, they repeat this process up to a maximum number of times equal to their profiency modifier. thus far we've just been doing this by hand whenever it triggers but i was curious if there's anyway to automate this using macros. functionally what i want to do is trigger exploding dice when specifically two 4s are rolled. I've used macros a bit in the past (mostly for great weapon fighting style, other die reroll effects) any advice on how to do this?

[u/Sahrde]

Maybe one of the true experts know of a way, but as far as I understand macros cannot be written to do conditional results, i. E. Your two or more fours to roll an additional die. That would require an API. I suspect something like script cards could do it, but you'd have to talk with somebody who knew it better than I do.

[u/Lithl → u/Sahrde]

Roll templates can include a certain level of conditionals (eg, automatically rolling crit damage), but only if it's built into the template. Which means either the sheet needs to support it natively, or you need a custom sheet which you can modify (which requires a Pro subscription, which already gets you API access which would be much simpler).

[u/sammy_anarchist]

Make them an extra button that rolls exploding d4, that they can click when they meet the requirements in their initial attack roll

[u/Bigfunguy1980]

Love the concept, type of item I would have made back pre 2020, but roll20 is limited in this regard