Implant Urge

[VRMH]

The Implant Urge spell is marked as allowing a partial Will save. But its description doesn't mention anything that's only partial - it's all or nothing. Does anyone have any idea which parts are Will-saved and which parts apply regardless?

Implant Urge:

You make the target unconsciously desire a goal you define when you cast this spell. The DC of any Diplomacy check to ask the target to act in a way that it believes will lead it toward that goal decreases by 5. The target takes a –2 penalty on saving throws against mind-affecting effects that compel it to act in a way that it believes will lead it toward that goal. Spells that reveal the target’s goals or thoughts reveal the implanted urge as the target’s most important goal and the target does not register as thinking of anything else as long as it is presented with the focus of its urge or a way to move toward its goal. Anyone studying the target’s thoughts can notice the implanted nature of this urge with a successful caster level check.

[Pizza Lord]

I don't see anything implying a partial effect either. My assumption would be that originally the spell's designer may have had a partial or lesser effect in the initial design but it was edited out.

Like you note, the current reading, which is all I can go on, should be 'Will negates'.