Unworthy Energy Question

I've been hearing all over the place that the Unworthy at the entrace to tombs, and all other NPCs have unlimted energy.

I haven't played an energy denial build in tombs since they changed it to the current method, so I haven't been able to test it.

Now I have just finished making an energy drain build, and I want to know if it will actually shut down the unworthy casters.




In the form of a question:

Do the Unworthy NPCs in tombs have unlimited energy, or will they hit 0 at some point?





PS: I did a search for "NPC unlimited energy" and nothing even remotely related came up.

They hit zero but they certainly seem to have a lot of it.