[Gorthaur the Cruel]

Y'all have to wonder if Ungoliant could have destroyed the Girdle of Melian and Melian's physical form itself had not the Balrogs whiplashed her. We are told in the Silmarillion that she was stayed by the might of Melian, but then this was AFTER she got her eight-legged, gluttonous a$$ beaten by the Balrogs. If She was able to subdue Melkor (thanks to the powerful Trees' sap she drunk dry), I don't see why she couldn't single-handedly destroy Doriath, which was guarded by one Maia. Remember Tulkas and the rest of the Valar were entagled in her darkness during their pursuit, and the horn of Orome faltered. Great is her might, this Ungoliant.