How to Complete Bonga Bugle - Rosefire
The objective is to put five pots on the five tree stumps in the forest. The law forbids the use of piercing weapons (rapiers, spears, javelins).
To put a pot onto a tree stump, walk to a tile next to a stump. You will have the option to put an urn there. Monsters will be attacking you, but if you kill them, more will appear, so you might want to just ignore them.
After you have put five pots onto the tree stumps, the quest ends.