- Sea of Blood's discount applies to playing events from shadows. (Source)
During challenges, reduce the cost of each event you play by 1 for each blood token on Sea of Blood. You cannot play events during or challenges.
Reaction: After you win a challenge by 5 or more STR, kneel your faction card to place a blood token on Sea of Blood. Then, search your deck for an event, reveal it, and add it to your hand. Shuffle your deck.