Suggest scrying on Bubungo, since The Undertaker seems to have had a history with him already; then ask him if he can tell me anything about Dragon's Hollow.

“I think I want to scry on an ape I encountered named Bubungo, that shaman made it sound like you might know him. Also, would you be able to tell me a bit about a nearby village I’ve been hearing about? It’s called Dragon’s Hollow.”

The Undertaker stares at you with a confused look on his face. “What an odd question to bring up at the start of a scrying ritual. Yes, I know of Dragon’s Hollow. It’s a small fishing village, only about a 20 minute walk down the road from here. I purchase fish from the local traders periodically, but it’s fairly unremarkable. Now then, I was under the impression you wanted to scry on multiple people, and you have provided me with enough reagents for five visions, yet you have given me only one name. I cannot stop the ritual once it has begun, so if you wish to see more than one vision then please provide me with all the names you seek.”

Looks like The Undertaker wants to know all five of your scrying targets before the ritual can begin.

What will you tell him?

> Put aside your actual mission and ask to scry on your ex-girlfriend instead.

> Struggle to come to terms with the fact that a place called Dragon's Hollow could be so uninteresting, then explain my plan to spy on our mutual enemy and share the names of my friends for the scrying ritual.