The target of the game is to knock out villain. This card gets insane value (1 ER per 5 damage) which is superior even to the hero specific events. However there is a small "but". First you need to reveal treachery. It can be something, that's automatically end your game. The harder scenario you play, the more dangerous this card is.
Summary: (A-C): B- in standard/easy scenarios C+ in rest.