Setting up DC for Warlock spells vs. Sorcerer with a Rod of the Pact Keeper with a Sorlock

Using 5e OGL.... Is there a way to set up warlock spells DC for a muticlass with a Rod of the Pact Keeper. I was able to add +2 for each of the warlock spell attacks. I want to set the DC for just the Warlock spells to have the +2, but I do not see a way to either add anything to DC or Change  Is there is anyway to add a new type of ability like WSPELL to the drop down for DC, or add in the spell attack box? TIL

There isn't a way to put it directly into the sheet, but you can use a hacky workaround. Put this in the Description field in the Attacks & Spellcasting section for each Warlock spell that forces a save: }} {{savedc=[[@{spell_save_dc}+2[RotPK]]] If you already have something in the description field, just paste that right at the end. Otherwise, make sure there's no space in front of the }} braces, or you'll get an empty description box each time in chat.

Wow that is all sorts of awesome! For those in the future, just add this to the description as suggested, you do need need to define RotPK Before and after rolls: Hover over DC15 Spell setup: Hover over DC: Thanks so much!

The only caveat of this approach is that the spell DC still shows as 15 (original) in the attacks list: