Obvious answer
I like these discussions, as well as the perceptions of the people in this thread.
However, the answer to this question is simple and the arguments are all moot.
First and foremost, an artifact is an object of immense power. Placing it into any space for a prolonged time is going to have consequences in the long run.
Back to the main issue, what occurs depends on what exactly the artifact does...
- If the artifact generates the wraiths itself, so that they literally come out of it, then the wraith can easily crawl out of the opening to the bag of holding, particularly since the wraith can fit through the small hole.
- If the artifact "teleports" the wraiths, the answer is even more obvious. A bag of holding is technically 'non-dimensional' space. I prefer to think of it as the expansion of space so that volumes are affected, meaning that the objects actually have their "space" compressed, so that if a bag of holding was see-through, you could see the stuff floating inside and "smushed". Of course, volume and distance are two different things, especially where magic is concerned, and the 'non-dimensional' space doesn't technically HAVE any significant distance inside it. This means if the artifact summons a wraith even one foot away from itself, they'd be appearing OUTSIDE OF THE BAG.
Either way, holding an ARTIFACT is dangerous no matter how you look at it. And even if they pierce the bag to release the artifact into the Astral Plane, I imagine it won't be the last they hear of it.
