pokemon card checklist lists TCG Set Tier List Maker/Ranking: 1999 - 2020 - General Pokemon Card Pokemon Checklist (Tracks Set Completion)

Even with ten fetchlands the probability to see one in the first ten cards (turn 3) is about 67%

The second ability lets you sacrifice two Treasures to put two +1/+1 counters on each creature you control, which can quickly make your board very threatening

There are a bunch of ways to do this

While this Rayquaza is nowhere near the value of some counterparts you would find among the most expensive EX-era sets, it's still an incredibly popular card to collect

Upon entering the field, it can immediately target any opposing character and place them directly into the opponent's inkwell, completely bypassing standard destruction triggers and discard pile recursion