Stats: Fiend Comedian is a normal Trap card.  It has no trigger restrictions (though would do nothing if there were no cards in your opponent’s Graveyard), so I feel it would have been better as a Quick-Play Spell, so that it could be played from hand.  I find Jinzo/Royal Command to be only as troublesome together as Imperial Order, so the “playing from hand” would put it over the top. 

Effect(s): Possibly the ultimate in removal cards.  You flip a coin, and if you call it right, you remove all of their cards from play that are in their Graveyard.  I have removed over 20 cards from play in one shot with this thing.  There is a powerful downside though- call it wrong and you have to discard from the top of your deck a number of cards equal to the amount in your opponent’s Graveyard.  I have had to discard over 20 too. 8-X As I believe the inability to discard from your deck due to lack of cards results in a loss just as the inability to draw to due a lack of cards in deck does.  So far, this card looks awful as a result. 

Uses/Combinations: So why play this thing?  It’s the combos.  First combo that is the least useful is running it with Exodia.  Timed right, it will thin your deck perfectly, but if you blow it you might deck yourself out before you can assemble the pieces.  Generally you wouldn’t use it unless you had the right mix of pieces and Back-Up Soldier cards so that it can’t fail.  Second least useful trick is with something that requires you remove monsters from the discard to do an effect, but then you may need to avoid discarding certain monsters (like Dark Necrofear), making it a little better than Exodia.  A much better use is tying in with the week’s theme is with Shadow Ghoul or Chaos Necromancer-as long as you don’t deck out, discard all of that monster and all of your monster recovery, you are more or less set.  Fiend Comedian can also counter all of the above, but the best use it to supplement and counter one card that is in many, many decks: Fiber Jar.  As long as you avoid decking out, chaining to Fiber Jar -for sure legal if it was Flip Summoned, and I believe there is a chance to chain even if it was attacked and flipped.  Anyway, so long as you don’t deck out by it, then if you get it, your opponent is severely hurt, and if you call it wrong, it won’t matter since it all gets shuffled back in. 

Ratings 

Casual: 3.5/5-A not so good card that counters a great card and helps some good cards. 

Constructed: 3/5-Same, but you know how it is: more cutthroat here. 

Limited: 1.5/5-Little use here, unless you combine it with another set or the starters. 

Summary

I think it could have been better, but unless they ban Fiber Over here, it’s a card you should pack if you have the room.