https://forgottenrealms.fandom.com/wiki/Helm (A god who killed Mystra once, badly damaging the weave and creating wild magic and dead magic zones, lovingly known as Helmlands. I hope we encounter a few of those in our adventures, if only to make things more interesting)
Wouldn't we more than likely see the leftovers from the spellplague? I know there is still cave-ins from underdark areas because of it along with broken portals and messed up locations still not healed.
Edit* I might be mixing stuff up : /
