DnD Head Canons

[Scots Dragon]

St. Cuthbert speaks with a Scottish or Northern English accent.

Wee Jas has the voice of Grey DeLisle.

Most of the worst stuff of the Spellplague in the Forgotten Realms actually didn't happen at all, and the 'restored to normal' of 5th Edition was literally just people realising that rather than listening to tall tales. I personally blame Volothamp Geddarm.

Literally all of the cosmological models from the Great Wheel to the World Axis are have varying degrees of truth and falsehood, and rather than being the actual intrinsic structure of the universe they're an attempt by very limited mortal minds to comprehend things that just aren't actually completely possible to comprehend.

Golarion is pretty much part of the D&D multiverse, since it's closer to the standard than even some major settings like Dark Sun and Dragonlance.

Due to the links between universes that have kind of been hinted at repeatedly through various spells, characters meeting one-another, and the whole concept of Planescape, there are a whole bunch of interloper deities shared between settings even beyond the elven, dwarven, etc. pantheons. Some Faerûnians worship Boccob, for instance.

EDIT: the Wall of the Faithless does not actually exist