If you pray to your non-starting god while wearing opposite alignment, your original god may try to blast the helm off your head. This can have several possible outcomes:

• Your original god doesn’t interfere. The prayer proceeds normally.
• Your original god attempts to remove the helm but fails, possibly causing some HP damage, or uncursing the helm. The prayer then proceeds normally.
• Your original god attempts to remove the helm, fails in one of the ways above, but succeeds at interfering with your prayer, which then fails.
• Your original god succeeds at removing the helm (there are a number of fun ways to do this: they disintegrate it off your head, send it flying in a random direction, teleport it, drop it on the floor, etc.) Your alignment reverts back to its original and the prayer fails.

Helms of opposite alignment don’t instantly change your alignment. They still autocurse, but they instead constantly drain your alignment record, until it hits some negative value (-1? -100?) which triggers your alignment to change. When this happens, your alignment record is reset to 0, and no longer drains as long as your alignment remains something other than your original one.

If you remove the helm, it works similarly, rather than immediately restoring your initial alignment: with no helm of opposite alignment on and with a non-starting alignment, your alignment record constantly drains. When it hits that same negative threshold, your alignment changes back to its starting value and alignment record is reset to 0.

When removing a helm of opposite alignment, after restoring your original alignment, increment your god’s anger. Do it after removing the helm because then your original god gets angry at you for putting the helm on, not your new god.

If god anger is tracked separately for each god, it doesn’t need to be done this way; merely make your original god angry when you first put on the helm.

Crowning makes it impossible to change alignment ever again. You can neither permanently convert at an altar or put on a helm of opposite alignment after you have been crowned.

When you try and fail to wear a helm of opposite alignment in the quest branch, you only lose all your protection if you had it identified as a helm of opposite alignment.

If you dip for Excalibur while using a helm of opposite alignment to be lawful and the attempt would succeed, the Lady of the Lake notices that something is wrong. She emerges from the fountain, grabs your sword, turns it into Excalibur, and rips off your helmet. This allows non-lawfuls to get Excalibur, but only by defeating her.

When a monster wears a helm of opposite alignment, it becomes tame if it were hostile, hostile if it were tame, and either hostile or tame depending on the helm if it were peaceful. When it removes the helm, it undergoes a fresh peacefulness check as if it newly generated.

If you manage to get an aligned priest to wear a helm of opposite alignment, he becomes a priest of a different god. (Not defined what this should do to Moloch priests; maybe their heads explode?)

The helm of opposite alignment has no effect on neutrals (except autocursing). Alternatively, some helms may turn lawful and chaotic characters neutral.

Helms of opposite alignment use a hash function for determining what alignment they’ll set a neutral to, instead of just using object ID mod 2.

If you attempt to put on a helm of opposite alignment in the Astral Plane, your god is angered and disintegrates it off your head before your alignment changes.

The helm of opposite alignment may turn lawful or chaotic characters neutral, instead of always converting to lawful or chaotic.