5th Edition OGL v. 2.5 Changing Settings through macros

I'm about to host a Dragon Lance game, and here the moons of magic will regularly change the bonus/penalty the wizards gets on the attacks and DCs, but while there is generic "global skill/save/damage/attack/ac modifier" there are no generic modifier for spell DC and magic attack, here I have to enter settings every single time and manually change the value on both fields accordingly. That is going to be really tedious when that happens roughly every 4 in-game days it has to be changed in one way or the other. Is there a way I can setup some macros for my wizards to change these values ? fx: %{spell_save_dc_mod=1&global_magic_attack_modifier=1} or something similar Thank you

Macros can only read  attributes. The API, however, can change  attributes. ChatSetAttr would be perfect for this use-case, however the API is only usable in games whose creator has an active Pro subscription.

It would require a custom macro instead of a built in sheet macro, but you could create a character called Moons and give it three custom attributes called Solunari, Lunitari and Nuitari. A Red Wizard could put +@{Moons|Lunitari} into their spellcasting macros, and other wizard types do similar. You would only need to change the three attributes on the Moons character sheet to affect all wizards of a given alignment. That's the basic idea, anyway. The final formulas I cannot write, not being familiar enough with the game mechanics required, nor with the OGL sheet. This is merely a suggestion on how to centralize the modifiers.