[Edi]

The sites that attack undead and/or demons do not advertise this fact. That list is as follows;
Holy fire (vs undead and demons, 10 an attack): Pool of Sanctity, The Ward, Sacred Glen
Holy power (vs undead only, 10 an attack): Gateward Valley, The Rainbow Shroud

There are also some other unadvertised little facts, like The Hall of Flayed Skins giving out curses to units...

However, there are several spelling errors in the various global enchantment announcements. I just don't remember offhand which ones they were.

Edi