Kill monstrous hordes until you can delete magic forever in tactics RPG The Last Spell

So, as we all knew they would, wizards broke the world and now there's purple hell mist filled with monsters that come for us each night. To fix this, they're making the wizards do a spell that deletes magic from existence forever. Now you just have to keep them alive for the days of uninterrupted casting it'll take to pull it off...
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