What is the Demogorgon (Monster)?

'Forgotten Realms' Lore: Kiaransalee

'Forgotten Realms' Lore: The Uthgardt

'Forgotten Realms' Lore: Giants

'Forgotten Realms' Lore: Eilistraee

'Forgotten Realms' Lore: The Church of Sune

'Forgotten Realms' Lore: The Cult of Selvetarm

'Forgotten Realms' Lore: The Emerald Enclave

'Forgotten Realms' Lore: Planetouched - Tiefling

'Forgotten Realms' Lore: Springtide - The Festival of Greengrass

'Forgotten Realms' Lore: Tales from the Tavern - Hulburg

'Forgotten Realms' Lore: The Ranks of The Red Wizards

'Forgotten Realms' Lore: Yuan-ti Houses

'Forgotten Realms' Lore and Mythology: Unicorn Run

'Forgotten Realms' Lore: For King and Country - The Armies of Cormyr

'Forgotten Realms' Lore: The Rise and Fall of Zhentil Keep

'Forgotten Realms' Lore: Bardic Lore - The Dead Three

'Forgotten Realms' Lore: The Merchant Nation - The History of Sembia