The first effect is a slightly watered down version of Disappear, a chainable way to disrupt the opponent's combos and weaken their graveyard.  That alone would not be enough to make it a good card, and that's where the second effect comes in.  Needless to say, you're going to have to dump a Fiend monster that will plus (or will help you plus) in order to break even off this card.  Thankfully, Burning Abyss is that archetype.  
 
Thomas Fletcher got top 16 in the recent YCS playing 3 copies of this card.
 
In his own words: " It ups the consistency a ton by giving you another card to access your key early cards, Graff and Scarm.  It also acts as disruption frequently netting you a +1 on each resolution.  Alternatively if you already have your engine rolling, you can send Back Jack to replace the Griefing with a new trap.  This card is amazing and I can’t see playing anything except 3.  It only really sucks in the Qli matchup which is pretty good anyway."
 
I'm expecting lots of BA players to take notice and run this.  As long as BA's are around, it'll see play.
 
3.5/5

Fiend Griefing closes our week, and in short, this is a precise and effective card to help make a solid Archtype run a little better.  This card has potential for any Fiend Deck, ignoring for a moment the obvious Necrofear connection.  For a bonus in addition to dumping your Fiend, you're first able to target a Monster in your opponent's Graveyard and return it to their Deck.  It's a Trap, which is chainable so that's a plus over just a normal Magic card.  If you're playing Fiends at all, you're not going to die by not playing this card, but one at least seems like a reasonable addition.  
 
Rating:  3/5

Art:  2/5  Not sure what's going on exactly, but this reminds me of gluttony, not grief

Fiend Griefing
 
This card would have been really useful when Darkworlds were a thing, but its actually quite likely to be very useful for Burning Abyss as you can chain it to prevent your opponent from gaining whatever play they were hoping to and then send your own Scarm or Graff from your Deck to the Graveyard and then gain its effect.
Essentially this makes it a more useful Trap version of Foolish Burial.
 
Returning an opponent’s monster to the Deck also makes this card a little better in most cases as quite often it can be harder to re-use a monster again from the Deck, especially if it is a non searchable monster.
 
All in all Fiend Griefing is a quite simple card with a very simple effect, but if used at the opportune time, (such as if chained to a Call of the Haunted) especially if used in Burning Abyss, this can become a +1.
 
 
Rating: 3.5. Not an essential card for Feinds, but one that is likely to be useful not only now, but also down the track… While it is only a Common and thus quite easy to get hold of, this may be one of those cards that will be quite useful in the future for any other Fiend Archetypes, as such getting yourself a playset or two now and setting it aside would be quite wise.

Hello Pojo Fans,
 
Fiend Griefing is a Foolish Burial for Fiend-Type decks, with the added bonus of being able to interrupt their graveyard use.
 
Anything being targeted in your opponents grave is open to be targeted by this card to be sent back to the deck. If your opponent targets a monster with a spell/trap, chain this and erase their target. Call of The Haunted comes to mind with is card. If a monster like Shaddoll Falco is giving you problems, send it back to the deck and throw one of your fiends into your graveyard from your deck. Decks trying to set up grave use like Heroes and DARK-based decks running DAD this deck
 
Play this in Burning Abyss as another Foolish Burial that can also get rid of a resource from your opponent. While you could run this without having a Fiend-Type in your deck, there are better cards you would run instead of this card if your only aim was to send cards back to the deck. There are other Fiend-based decks like Dark Worlds and Infernoids that can use this card to set up plays out of their own graveyard as well. Dark Worlds can set up Grapha, while Infernoids can stash any of their archetype members in the grave for later use or setup summoning conditions.
 
 
Advanced-2.5/5
Art-2/5- Fabled decks can play this, but they can't capitalize on it like BA can
 
Until Next Time
KingofLullaby