When weapons lose enhancement bonuses?

[Wandering Loon]

Happy Sunday, everyone!

I'm running my group through a high level campaign that has led them to the Big Bad's stronghold in a custom pocket plane adjacent to the Negative Energy Plane. One of the custom effects is that all magical weapons lose 1 off their enhancement bonuses. I don't plan for it to effect abilities, but I noticed one of my players has a weapon with several abilities, but only a +1 enhancement bonus.

And this is my main point of concern now: while it's a back up weapon, if he pulls it, how would you rule it is affected? +0 equivalent with all the abilities? Is it considered masterwork? Would the abilities still work with an equivalent +0? It's only in effect while they're there - once they leave it will return to +1 - it's just temporarily suppressed by 1.

I've looked and didn't see a thread covering this and I'm not aware of any rules on this. Any input would be appreciated.

[wraithstrike]

If it does not have a +1 then it can not have magical enhancements.<--That is the official rule. I might change the rules of the plane to affect weapons in another way, such as have it remove a random enhancement instead.

[Scythia]

Wraithstrike is correct, the rule is that a weapon or armor must have at least a +1 to have any other enchantment/ability.

Personally I ignore this for my home games, but that's just my house rule.

[Lifat]

By RAW Wraithstrike is absolutely right. But the effect you are applying is homebrewed, so I would likely either have it affect one of the other abilities of the weapon or handwave the RAW rule for this effect only.

[Wandering Loon]

Excellent. Thanks guys. I really appreciate your responses.

[seebs]

I am not sure they lose their other effects. You have to place a +1 enchantment on them to place other enchantments on them. It's not obvious to me at all that the temporary suppression of that +1 would affect the others. That is a requirement for when they are being enchanted, I think.