Theyre especially good in formats with high-impact 3-drops like Oko, Thief of Crowns or Teferi, Time Raveler
The Poke-Power Darker Ring has you swapping out your opponents active Pokemon with another from their Bench
Additionally, to these rarities there are a few more holographic rare which has a black star and shiny Pokemon picture
The Legendary Collection is a reprint of the earliest sets in Base Set, Jungle, Fossil, and Team Rocket expansions
Though this does mean discarding the other cards you reveal, there are numerous ways this can pay off, especially as youre going to play a card thatd normally cost up to 6 Ink for absolutely nothing (well, except the cost of losing the other three cards you draw, of course!)