“Sorry, master, I forgot myself. One moment, and I’ll go and see who it is.”
“Who is it, squidling?”
“My lord, it is Arch-Queen Xera, the Dark Princess of Dead-Wood, your nemesis.”
“Then show her in. This time, she shall not escape me.”
Many a memorable campaign has had at least one master villain who appears in more than just a single adventure. The main bad guy who comes back for more adds something to a long-running adventure path. A recurring villain gives your campaign, or a part of your campaign, a focus and a hate figure—someone on which you can hang whatever badness you wish, whether that is a feudal lord who takes land, a twisted warlock, or a serial killer who steals babies.
This ochre jelly is almost certainly one of many that have been deliberately created by alchemists and poisoners. The cloying poison ochre jelly exudes a contact poison that is difficult to remove. The jelly poison affects not only those slammed by the creature, but also those who touch it.