-50HP item, where to find it?

The title explains itself, could someone show me a map or tell me where to find the -50HP item for invinci-monks?

(I tried search-function but was not able to find it)

It's a reward for doing the Cities of Ascalon Quest.

If you want to be "uber" than gold Offhands can have the mods: +5 Armor -50 Health also.

(while purples have +4 armor -20 health)

Thanks to you both

I now have my -50HP item too