Willy Wonka is the perfect model of the ideal Dungeon Master

Do the common folk of the Forgotten Realms know the difference between fiends?

Horizon Walker: when casting, do they count against the total number of spell slots for your PC’s level?

Building a dungeon from scratch, any suggestions on design and fun puzzle?

Halflings in Mordenkainen’s Tome of Foes

How much did your Plain English RPG (PERP) system influence D&D 5E?