I didn't find it, but it was linked in the trade chat just a couple ago. It didn't have a name, just orange [ ] that I clicked on. The unique affix was "Chakram now generates 4 hatred".
While sure it's just like the Kridershot unique affix, I think it's a good way to buff chakram without just directly buffing it's damage - make it generate instead of cost. Thought some people might be interested =D
Edit; While on the topic, can we please for the love of god remove the poison rune for chakram!