"Okay", Mystery Man reluctantly agreed: "I will do you a favor. But first tell me where I can find my brother."
The Green Entity chuckled and said: "Good luck, Mystery Man: your Brother is in a hidden cave under the lake."
"Okay, and how do I get there?" Mystery Man asked.
"That is not for us to tell, we would only tell you where your brother is. Now it is time for you to return the favor."
A horde of creatures appeared on the horizon. All looking eagerly in anticipation. Saliva drooling from their little, thin mouths. "We now shall have all the nourishment you have gathered, Mystery Man. Hand it over, per our agreement."
"You tricked me!" Mystery Man shouted. The entities approached silently and, undisturbed, they drew ever closer. In the corner of his eye, Mystery Man suddenly saw, to his rescue: the Guardian of the lake.

Thank you for organising this game. It is fun!