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> A deep rift slashes across the surface of Avernus for as far as the eye can see. 
The canyon is over a mile deep and filled with a lake of green slime that undulates as though breathing. 
From a nearby cliff, the River Styx leaks down into the slime.
>
> Dangling from a bent iron crane that leans out over the chasm is an iron cage containing a hairless, green-skinned humanoid wearing shackles on its ankles. 
The crane lowers the cage by a chain into the slime, immersing the creature in the goo for a minute before hoisting it back out. 
This dunking continues again and again, and the trapped creature seems helpless to stop it.


Baazit the ultroloth

Promises to show the party how to form magical servants if they free it.

The party must stop the winch somehow.

After, they can thieves tool with DC 20 or cast Knock.

Rewards are creating homunculi and dimensional shackles