That's great value, allowing you to reuse powerful enter-the-battlefield effects for free, while ramping at the same time
It was awesome in two ways because your little Basic Pokmon werent as likely to get utterly annihilated by other Pokmon during the start of the game (well except for the whole Machamp thing, but Im talking more specifically about weakness here) and as an added bonus you could do some serious damage to your opponents bigger Pokmon with your smaller Pokmon if you fell behind (Ill hit your Machamp for 50 for one Energy with my Uxie)
Cards similar to Rule of Law include Arcane Laboratory, Eidolon of Rhetoric, Curse of Exhaustion
Its been around since Alpha , becoming keyworded in Future Sight
On the website, this Hydrapple exs market value rests at $33.69
Normally only as many circles as represent a Pokemon's Max HP will be shown.) (Early snapshot of the "Play Area" Screen