Helm of Opposite Alignment

Aside from the obvious change in alignment does the HoA have any practical uses when developing chars? For Instance, would it be able to turn a Priest of Talos into a Cleric/Ranger and the like?
0
Comments
The helm wasn't ever obtainable in the game without cheating or exploiting until it was added to the Demonknight in BG1:EE. I suspect it was an idea thought up by the original devs of the game and it was scrapped for whatever reason. Because of this the only planned alignment changes are plot related and pretty much a one shot thing. This means that, since there was no planning for an item that changes alignment, there is also no planning for any special effects of alignment change beyond what was planned for the plot. I would recommend being careful with your use of the helm as it may have unexpected/buggy effects on your game.
That said, I myself did use the helm in my blackguard run to change some of the outcomes of certain dialogs and encounters.
Disclaimer: Turn Undead is a mechanism that is hidden from me so I do not know exactly how it works. The above insights are based solely on my own experience and experimentation with the ability, so take what I say with a grain of salt.
To answer your question though, the helm can reverse the function of turn undead if put on a good or evil cleric.
I don't know if the helm is a possible protection against the clerical spells that damage characters of opposite alignment, like Unholy Blight, did anybody test it?
I think that it could be used my mages as well and thus you could wear one of the free archmage robes even if you were good.