Spellwrack - Persistent damage doesn't end?

[Battledwarf]

So, Spellwrack has the following saving throw conditions...

Critical Success The target is unaffected.

Success Whenever the target becomes affected by a spell with a duration, the target takes 2d12 persistent force damage. Each time it takes persistent force damage from spellwrack, it reduces the remaining duration of spells affecting it by 1 round. Only a successful Arcana check against your spell DC can help the target recover from the persistent damage; the curse and the persistent damage end after 1 minute.

Failure As success, but the curse and persistent damage do not end on their own.

Critical Failure As failure, but the persistent force damage is 4d12.

My question is about the Failure and Critical Failures, with the persistent damage not ending on its own. Does this mean that if triggered, the target would not get the DC 15 flat check every round to lose the persistent damage, and thus would take 2d12 (or 4d12) force every round in perpetuity until they find someone who can provide a successful Arcana check?

[Cordell Kintner]

They will take the damage until one of three things happen:
1. The spell triggering the damage ends. This only ends the damage, not the curse.
2. Someone makes an Arcana check to end the damage.
3. Someone successfully counteracts the curse, ending the whole thing.

Curses are fun.

[Battledwarf]

Cordell Kintner wrote:

They will take the damage until one of three things happen:

1. The spell triggering the damage ends. This only ends the damage, not the curse.
2. Someone makes an Arcana check to end the damage.
3. Someone successfully counteracts the curse, ending the whole thing.

Curses are fun.

Nice. :-)

So what if the target already has a buff spell with a duration, say of an hour. Target's cursed with Spellwrack and fails the save. An enterprising bard then tags the target with a Ray of Enfeeblement. We know that the target will take 5 rounds of 2d12 persistent force damage, as the enfeeblement would last for one minute normally. Would the curse continue to zap the target to get rid of the hour long buff, since they still have a spell with a duration?

[shroudb]

the curse activates when someone gets affected by a spell with a duration. So i would rule against it activating against already ongoing effects.

It would reduce the hour long buff by the 5 rounds, since it reduces "all spells durations" but it wouldnt stick to the buff after it is done with the spell that activated it.