When your dad worked on Dungeons & Dragons for 4 years some stuff tends to rub off on you. You’ll know the breath weapon of every chromatic dragon, have your own set of dice, and recognize the awesome beast that is the Beholder.
Here is a picture Henry drew for me the other day. Shaggy and Scooby are about to meet the eye tyrant and this one aint no old man in a costume.

Roll For Rinitiative Raggy