Rules FAQ
- The claim value used is the claim value on your revealed plot card. Since this happens outside of any challenge, any modifiers that apply "during a challenge" do not apply here.
Interrupt: When the challenges phase ends, kneel a Steward or Raven card to choose an opponent who does not support you and a challenge type that has not been initiated against you this phase. That player must satisfy the claim of that challenge type as if you were the winning opponent. (Max 1 per phase.)
Link: Decklists
Rules FAQ