How many of these you play is going to depend on a few factors, including your decks strategy, colors, and budget
Special Guest Cards All five enemy color fetchlands appear as special guest cards, with a non-foil version showing up in play boosters and a traditional foil showing up in collector boosters
Having Flash on this makes it very similar to Stunt Double
For more cards that reward you for discarding cards, card draw is a surprisingly common payoff
Even in a non-energy deck, Amped Raptor gets sick value if your deck is full of only 1- and 2-drops, which is easy to do in aggro decks
Unfortunately, Kruphix doesnt really have another ability to build around