Visit a Sycophantic Goblin usually around the bridge in Rune Forest. He often wanders, and can travel very far - you will likely need to search the entire area, including the river (enter hedge) as he can easily get dragged anywhere within Rune Forest. If you don't find him right away, look at a map here: Rune Forest and make your way through each area.
For displaying charisma in unusual circumstances, the Powers have granted thee a Mark. You have been granted the Mark of Charisma! You gain 157,500 experience points! You gain 40 practices!