Negative energy protection

[Endril_69]

I'm looking for the cheapest way for a party of level 7 characters to survive a couple days in an area filled with negative energy. The spells I've thought of don't last long enough, and the items are too expensive. Any thoughts?

[Hua]

If they just have to survive and do nothing, repeated castings of Rope Trick. Stay extra dimensional.

[rel]

Planar tolerance is hours per level

[bean illus]

Planar tolerance is hours per level

Yeah, and 1 creature per level.
At 4th level it's a wand on Cleric, Wizard, Druid and Ranger. It can be cheesed as a 2nd out of Elysium domain. A rod of Extend could be a shared expense of the party.

[Kaleph]

Alternatively, attune form lasts 24 hours/casting, but affects a lower number of characters; depending on the party size, it could be preferable to planar tolerance.

[RNightstalker]

Craft rings that won't work a week later for a cheaper price, or have the group's mentor pony up lol.