Kruphix's Warning

When Purphoros attacked Heliod in a destructive rage, Heliod demanded that Kruphix intervene. Kruphix constrained the forge-god’s mind and memory in punishment for his attack. He warned all the gods that if they threatened the mortal realm with their disruptive quarrels, he would bind them to Nyx for as long as he saw fit. As of yet, no god has dared to test Kruphix’s threat, but there are certainly those among them who might try if they could see a way to retain their own powers.