The old man could be a healer. He has spent his life studying the art of healing. He uses natural herbs and ancient spells to cure the sick and injured. When the adventurers are wounded in battle, they seek his help. He might also be on a quest to find a rare ingredient that can cure a deadly disease spreading in the land.
An old man could be a gatekeeper. He guards a mysterious portal or a secret passage. Only those who can solve his riddles or complete his tasks are allowed to pass. He might have been placed there by an ancient order to protect something important.
Another plotline could be that the crazy old man was wronged in the past and is now seeking revenge in a rather unhinged way. He might be using his old age and the element of surprise to outwit his enemies. He could be creating all sorts of traps and illusions to get back at those who wronged him, and the players get caught in the middle of this revenge plot.
I'm not sure which specific 'crazy old man dnd story' you are referring to. There could be countless Dungeons & Dragons stories involving crazy old men. Maybe it's about an old wizard who has gone mad and is causing chaos in the game world.
There was an old man in a DND setting who was a former knight. He was old and frail but still had his honor intact. A group of bandits was terrorizing the local village. The old man, despite his age, took up his old sword and shield. He joined the villagers in their defense. He taught the villagers some basic combat skills. In the end, they managed to drive off the bandits. The old man became a hero to the village once again, just like in his younger days.
He could be a mentor. In many counterworld novels, an old man often has great wisdom and experience, guiding the protagonist through the strange and dangerous counterworld.
The old man, like Santa Claus, is the bringer of gifts. He spreads joy among children.
One possible story could be that the 50 - year - old man joined Tinder out of curiosity after his divorce. He was initially intimidated by all the younger profiles but then found a woman around his age who shared his love for hiking. They started chatting, went on a hike together, and are now in a committed relationship.
His role could be that of a family provider. He might be responsible for getting the family Christmas presents and making sure there's a nice dinner on Christmas day.
He could be a mentor. For instance, in some stories, the old man has a wealth of knowledge and experience and guides the younger characters.
The old man could be a mentor, guiding the main characters with his wisdom and experience.
If the old man in the story was helping out other customers, like an old - timer sharing his wisdom on which products are the best value for money, that would be really interesting.