pokemon rising rivals booster box Platinum: or Arven and Mabosstiff ex Or reconsider your loyalties and fight alongside Team Rockets Pokmon like Mewtwo ex Pokemon Platinum Rising Rivals Booster

The card in question was a Mew Star (Delta Species) from the 2006 Dragon Frontiers Pokmon set - a rare card that currently sells for around $450 on TCGPlayer

And sure, the pull rates are notoriously difficult, but the potential to find the Moonbreon makes it a legendary experience for those with patience (and a whole lotta cash)

It may be cast this way again

Its got milling (look at the Commanders abilities for starters)

Number 90 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pauper, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Standard Rulings (10/4/2019) You must sacrifice exactly one creature to cast this spell

The last ability of Corruption of Towashi will trigger if a permanent you control transforms in either direction, going from front face up to back face up or vice versa