This is the set that introduced the world to the iconic holo Charizard, along with other unforgettable cards like Venusaur, Blastoise, and Professor Oak
While the front side is good enough to see play on its own, the fact that it only has four defense counters makes it relatively easy to flip (a single Sheoldred, the Apocalypse attack gets the job done), and the backside offers a very powerful creature that can defeat a battle or kill a planeswalker each turn while potentially generating card advantage as well
Putting three +1/+1 counters on a creature each time you gain life is no joke
All of these were printed early on in Magic's lifetime - in Alpha, Beta, or Unlimited - before balance had been fully figured out
Because Raging Redcap doesnt have trample, its damage in the second combat step cannot get through