Is it possible to code these effects?

[Olodrin]

Advantage on INT saves vs magic
Advantage on WIS saves vs magic
Advantage on CHA saves vs magic
Advantage on saves vs charm

Thanks,
Olodrin

[Trenloe]

Nope, I'm afraid not. See the ADVSAV description at in the modifiers table here: https://www.fantasygrounds.com/wiki/index.php/5E_Effects#Modifiers All you can specify is all saves or a specific save, you can't specify the type. Ask the GM what type of save it is before you roll!