Northerners' Outpost Heroic Challenge
That taught them a lesson! With their resources at our disposal, all will tremble before my army! Now it's time to take the frozen north, a harsh land full of dumb northerners who believe might comes from brawn. Show them where true might lies!
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Northerners' Outpost is the seventh stage of Kingdom Rush: Vengeance. The tower Melting Furnace is unlocked at this level.