Well. As far as results of a sabotage-induced hearthstone explosion combining with a Death Gate go, getting thrown into… wherever this was… isn’t too bad. It isn’t the Twisting Nether, which is promising, and she doesn’t seem to be (more) dead.
Her Death Gate isn’t working. Hopefully that’s because the explosion messed with the ability somehow, and not because Archerus (or the portal destination area, at least) got exploded.
First, she needs to secure her immediate environment. Then she can investigate more thoroughly.