Maxperson
Morkus from Orkus
The absence of preclusion does not mean inclusion. It's still a house rule to add to existing rules, even if not precluded from doing so.Sure, if that's enjoyable for a particular group, the rules don't stand against it.
The rules don't preclude it, no, but it does seem to run counter to the intent, if that's something that concerns you.
The spell specifies damage, so you've departed from the rules considerably here.
That example, sure. However, there is no departure if he does the damage and just adds healing to the spell.
I don't understand what you mean by "by exclusion". I see no contradiction except in the case where the spell says it does damage and you have it not do damage. Does it mean nothing can happen in the game unless a rule tells you it happens?
Nope. I just means you are creating rules when you fill in the gaps the game leaves you.
Here's an example: sunburst says, "This spell dispels any darkness in its area that was created by a spell." Does this mean the "brilliant sunlight" created by the spell has no power to illuminate mundane darkness?
It means that it does not dispel mundane darkness, just like it does not illuminate darkness created by a spell. Illumination and dispelling are two different things. Being a burst, it only lasts an instant, which may not even be enough time to see anything.