Neutral.
Character. Coste: 3. FUE: 3.

Spy.

Shadow (3).

Reaction: After you win a challenge in which Harrenhal Cupbearer is participating, return it to shadows to choose and kneel a non-Spy character controlled by the losing opponent.

?
Sea of Shadow (Unreleased) #102.

Link: Decklists

Harrenhal Cupbearer