From the TV Show Cursed, Merlin is talking to King Uther.
Merlin: ...Father Carden and his paladins are dull vessels for these old hatreds, and nothing more. However, if His Majesty would allow it, the Shadow Lords may be able to offer some service here.
King Uther: Shadow Lords? It's a bit late for your enchanters to help us now.
Merlin: Not necessarily. They can pull certain strings to slow Carden's march. There are Shadow Lords at every level of socie--
King Uther: [yells] We want rain, Merlin! To hell with your Shadow Lords.
Merlin: I will redouble my efforts, Your Majesty.
King Uther: Yes, do.