SPOILER ALERT! D&D Players, this is only for DMs/GMs/Narrators so send it to them, but dont’ watch!
The Creator god Praemus created the world of Pramael as a Prison Plane for the Galchutt. The Ethereal Sea exists, but only occupies the same metaphysical space as Praemal. Creatures cannot use the Ethereal Plane to leave Praemal.
Astral projection and plane shift don’t exist and don’t work.
Banishment and holy word only stun creatures.
Summoning monsters/creatures works normally.
Spells that call otherplanar entities (bring them physically) will likely be ignored.
Let me know in the YouTube comments what you think about this rule!