User blog comment:Water Dragon Slayer/DREAM BATTLE CHRONICLES: FOURTH MATCH!/@comment-11966702-20130807140132/@comment-122.144.120.94-20130808040120

Yeah that one.

As for the WDS's question, I think Hades was already using Darkness magic when he was still a FT mage. I based it on the FT's picture with the founding members of the guild, Hades is seen wearing his limiter (the eye patch).