Jörmungandr
In Norse legend, the two are prophesied to meet in battle for a final time when Jörmungandr emerges from the ocean and poisons the sky. Thor destroys him but the god of thunder having been poisoned by the serpent, falls dead after taking nine steps away from his fallen enemy.
在北歐神話的末日之戰「諸神的黃昏」中,耶夢加得與地上的邪惡勢力互相產生共鳴。牠從睡夢中甦醒過來,在海底不斷翻騰著,引起滔天巨浪淹沒世界,並且來到阿斯加特的土地上,正式向諸神宣戰。牠的交戰對手,正是與牠有極深恩怨的雷神索爾。索爾深深了解巨蛇的威力,不敢怠慢,三度將雷神之鎚擲向耶夢加得,都被耶夢加得巧妙避過。巨蛇亦不示弱,一直向索爾噴出毒液。最後,索爾成功以巨鎚擊中了巨蛇,巨蛇的毒液亦深入索爾的身體,結果雙方同歸於盡。