This is the first black creature with the subtype Crab, and while weve had some black oozes printed before, I dont think theres enough cards out just yet to make a crab ooze horror tribal list so I dont think people will run this card for its power is equal to effect too often
One of the better and more efficient effects that lets you look at your opponents hand and do something about it, but its a weird amount of control to have on such a cheap card
Decks that run Dark Patch tend to include 4 copies of the card
A successful deck also requires a good source of card draw
The Regular, or Unlimited set was printed in an unlimited quantity, around 7-8 print runs
I think this works in Up the Beanstalk decks in Standard, maybe Pia Nalaar, Consul of Revival decks, but probably in no other context in 60-card formats