Far as I can tell, all of the effects of the broken wand were centered on Hastria. I suspect it's from a wand that had no apparent effect when it was cast.
Once I have to start holding my breath I can do that for a minute. Then how long I'll last after that is all in the hands of the dice by death saving throws.
I think that would actually be incredibly bad for us against enemies at morning. Because if we're trying to sneak up on them that's going to give us away.