After revising the guild, Dean learns that every healing potion in the city is not functioning. Adventures are scrambling out of the
Yarning portal, an inn and entrance to a huge dungeon underneath Waterdeep. Clerics are on rotation down there to heal all the injured ones, who had put their faith in the potions.
Other adventures have been sent outside the city, and teleported to other big cities, like Candlekeep and Baldurs Gate to see if they have similar problems. They are waiting for answers.
Those with magic abilities can cast healing spells like normal, but no one can seem to be able to bind the healing magic to liquid form anymore. There are rumours about some who can produce a stable healing potion, but there are hundreds of rumours going around. Including that the gods have retaken the knowledge, that some hero stole centuries ago (Aking to Prometheus stealing fire from the gods)