(I would like to think that Unsubstantiate for only spells would be common because it's very much worse than multiple uncommons.) Meanwhile, Comply is also unique, but it certainly isn't rare, considering that Silence costs the same amount of mana and keeps an opponent from casting anything for a turn, while Comply requires you to "guess the right card" for it to have any effectand even if you guess right, it only stops one card
It is a shame, however, that both the Mewtwo AR and Mew SAR were removed from the Japanese version of 151 to be instead included in the West's Ultra Premium Collection
It also plays exceptionally well with double-striking Warriors, and it even counts itself if you can somehow slip this 1/3 past an opponent's blockers
After 21 years, the card was up for grabs in a 2020 PWCC auction and it sold for $65,100 in GEM Mint condition
In the above example youre only a turn ahead if you make your third land drop, giving you access to 4 mana on turn 3