I'm in a huge argument with a friend. Blood Boil reads "Trigger: Unit is slain. Effect: Unit is not slain but remains at 0 hp and becomes immune to all damage." The victory conditions read "In all situations, you are defeated and lose a battle when your necromancer is slain."
So my homie hits Warcord, she's already used Blood Rage, I burn 4 Soul for Blood Boil. He says that since she was slain, as the trigger, the game ends instantly. I argue that the nature of the power implies she's not slain and she'd get another turn.
What's the official ruling?