It's good in an Exodia deck, I suppose. I was playing Nightmare Troubadour the other day, and Yami Bakura used D. Duo, forcing me to discard my Exodia Right Arm, basically meaning that I couldn't win the duel. I then proceeded to draw the other 4 peices in the next 10 draws. :< So Des would have helped in that situation.
I can't think of a single situation where Des Feral's effect would do better than another card. Maybe if he just stuck the card as your topdeck, but the shuffle thing makes things far too difficult.
He has his uses...Nice early defender, but where would that take you? Like Alfonso said, very good in an Exodia(or Spirit Message) deck. Can't be searched for, though.
Even though I use him in my Goth-Fiend deck for retrieving Dark Ruler/Necrofear/Great Maju since I don't have Monster Reincarnation, I wouldn't use him anywhere else though... MoF/MoD/MR are better.
;354;~Dark Magician~;354;