Gehenna

A volcanic mountain dominates each of the four layers of Gehenna, the birthplace of the yugoloths, which dwell here in great numbers.

The ground inclines at least 45 degrees almost everywhere. The suffering petitioners of this plane must cling desperately to the slopes or risk tumbling into oblivion. The barren bitterness of this land makes the petitioners suspicious and greedy, so much so that no petitioner of this plane will do anything without some kind of payment.

The plane’s cruel nature makes it difficult for visitors to help one another. Whenever a visitor casts a spell with a beneficial effect, including a spell that restores hit points or removes a condition, the caster must first make a DC 10 Charisma saving throw. On a failed save, the spell fails, the spell slot is expended, and the action is wasted.