While Wizards cant legally acknowledge the secondary market, because to do so would implicate themselves with regards to gambling laws (yes, cracking packs is a form of gambling if some cards are worth more than others), they can do more to show respect to the game stores that have been selling their products for 30 years
When its in play, you reveal cards from the top of your library until you reveal a Creature or Planeswalker, then you put that card into play
Persist is a very sweet ability thats often looked down on because design teams avoid mixing mechanics that use +1/+1 and -1/-1 counters to minimize confusion, and mechanics that feature +1/+1 counters tend to be very popular
While this wont grab land cards from your deck, if you combine it with some incidental card draw thanks to other colors, you can quickly end up with an unmatched number of Lands on board
Ivy, Gleeful Spellthief can take this strategy to a new level
So, when used together, that means Merida can dole out a lot more pain