I'm making a ring for barbarians that offers a modified rage on death mechanic and I want it to set the character's INT, ChA, and WIS to 5. How would I go about doing this?

I have applied three modifiers but they don't seem to apply when equipping or attuning to the ring.
What I have applied is basically this (with wisdom swapped for the other two abilities):
Modifier Type: Set
Modifier Subtype: Wisdom Score
Ability Score: WIS
Fixed Value: 5

Does anyone know what I'm doing wrong here?

I think that the "Set" then "ability score" only applies if the base score is lower than the new target score, not sure how to do what you're proposing, perhaps tailor the item to the individual and make it a Modify rather than Set and use a negative number?

You gave me an idea which got the result I wanted.

Basically, I added another three modifiers, each one giving a -20 bonus to the ability scores. I suppose this sets their scores below 5, then back to 5. It's kind of clunky but it works.

Thanks for the idea!

Smart, didn't think of that! Thanks :)