That was a total failure. They killed one evil dragon, which means absolute nothing when there are nearly thousand left in the warehouse. However, they let the three vampires, including the mid-boss level not-queen escape. The dragon palace was badly damaged and the seal there broken. All of this, potentially, happened because Luck decided not to fight, for no particular reason, before the evil dragon appeared. Perhaps he actually, secretly, hopes the full horde of evil dragons will be set free. It would be a worthy opponent for him. Individual evil dragons barely work as warm up exercises.