I have a homebrewed 9th level spell and I've designed to use a d100 for its damage roll; however no d100 option is available on dndbeyond. I know d100's are traditionally reserved for percentile rolls and other miscellaneous niche stuff but homebrew isn't traditional and d100's are fun. I'd really like it to see a d100 option included for homebrew spell rolls.

I know a d100 comes with a wide range with highs and lows but I'm not worried about balance. I'm happy with the spell as I've designed it. I'm not interested in using other dice types.

And yes I know a player can manually roll a d100 from the character sheet but I'd like it to be included in the spell section so it's streamlined.

And if there's already a d100 option for homebrewed spells, I'd be interested in learning how to use that for homebrew. Specifically for my spell I've gone: into the homebrew spell editor, created a modifier, selected damage, the damage type, but the only dice options are d4-d20's. I guess I could use 2d10 but then there's an issue of determining which d10 is which after the dice have already been rolled and I don't like that because that'd open up some conflicts of interest.

D&D does not use a d100, instead it uses “percentile dice” which is not an available option in the homebrewer.