KarinsDad said:
I can understand how you could mistakenly infer that from the spell, but that would be invalid.
Full of ourselves, aren't we?
"The character's own oak cudgel or unshod quarterstaff becomes a weapon with a +1 enhancement bonus to attack and damage rolls that deals 1d10 points of damage (+1 point for the enhancement bonus) when the character wields it."
Note the word "rolls", not "roll". Any damage done by the weapon does D10+1, not just one end of it.
I could see how you could mistakenly make that inference, but it is invalid. (Doesn't sound any better coming from me, does it?)
That is "rolls" as in "all damage rolls you make with the weapon over the duration of the spell." This has absolutely nothing to do with how many ends the weapon has, and is thus irrelevent to the discussion.
It explicitly states that the cudgel or quarterstaff
becomes a weapon with a +1 bonus that does 1d10 damage. It is no longer a quarterstaff or cudgel, because it has become a different weapon. (Presumably called a shillelagh, but you seem to have a problem with calling it that.)
"A quarterstaff is a double weapon."
Nowhere in the spell does it state that the D10 can only be done once. Nowhere in the spell does it state that a quarterstaff will no longer be a double weapon, or that its size or shape will change.
Yes it does. It states that it turns it into a +1 weapon that does 1d10 damage.
It does not state that it turns it into a weapon that does 1d10/1d10 damage.
Therefore, by definition, it is not a double weapon.
Without the spell explicitly calling out that it changes the weapon from a double weapon to a single weapon, you cannot infer that it does because it states that the damage becomes D10+1.
It explicitly turns it into a weapon with a single damage rating, so that's exactly what it does.