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And everyone seems to have forgotten that the villagers also have a voting restriction... Want to lose? Then enjoy the execution of Neira. The villagers have probably already figured out who the Blood Mage is. After that:
1) Neira is an Undine. The villagers block the Blood Mage and try to execute him. If they succeed, it's a clear victory.
2) Neira is an Assassin. The Messiah, relying on his 50% immunity, attacks the Blood Mage, removing his protection. The Blood Mage doesn't kill/resurrect him during the night. The villagers have the majority in the vote. They either execute the Blood Mage or prevent the execution from happening, saving the Assassin for themselves. The Blood Mage dies the next night. Another victory for the villagers.
I tried to help everyone... It's a shame my warnings weren't heard...