I would not keep "Land, Dredger, Faithless Looting, 4 cards that only are useful in your graveyard."
I might keep "LED, Dredger, Faithless Looting, 4 cards that are only useful in your graveyard."

I wouldn't really keep the first hand even if I had a Tireless Tribe instead of Faithless Looting, but I think it's a better keep.