Soul Food

Description
Does not seem to require you to finish off the Hostage. If a Hostage dies, you will gain 20 max health.

Strategy and Synergy
Soul Food can be activated after a Hostage's timer expires while they are still on the Battle Grid.

Even if you never intend to kill any hostages, they're likely to die anyway in hectic late-game fights. Regardless of your strategy, consider picking this up for some extra health.