Martell only. Response: After a Sand Snake character is killed, kneel 1 influence to search your deck for 1 Sand Snake character, reveal it, and add it to your hand. (Kneel 3 influence to search for any number of Sand Snake characters and put them into play instead if The Red Viper was just killed). Then shuffle your deck.
If Red Viper will be killed can I put in play 5 sand sneak characters each with 2 duplicates into play?