User blog comment:Lambda1/"We Happy Few" - Discussion/@comment-6637171-20160522164102/@comment-34326521-20160522164622

With a human.

This isn't about power. The Leviathans, for example, were monsters, but they were well on their way to eating the planet, something even Lucifer couldn't do. The idea will be to provide a different challenge for Sam and Dean, rather than just increasing the threat's power with every season.