My question was just to elaborate...well... the question.The issue that I see is that it comes back at the appointed time regardless of the campaign's narrative. I guess you're just supposed to make something up that fits the rules as written? That's my problem with 4e all over again.
If it comes back as a narrative of being rebuilt over time, then we have no problem with that narrative being pushed back or made harder by periodical narrative attacks by dimensional flumphs per se, or even time narratively reduced by neighboring allies pitching in.
If the answer is "poof" its back, well then I guess narrative would not really effect that. Disconcerting indeed.