Look in the bottom right corner of the card to find the rarity symbol, next to the card number: card rarity
Now, Yanagis treasure deck strategy is usable as all three monsters can finally come together
During either player's turn, when your opponent activates a card or effect that would destroy a "Z-Fighter" monster(s) you control: you can negate that activation, and if you do, destroy it, then Special Summon this card
List the cards that you need to improve your deck and make it your business to buy those cards
Its the kind of card that can swing a losing game in your favor, rebuild after a board wipe, or even just assemble a full combo from your graveyard in one swoop
The ability makes it tough to use unless youre running a full Rocket build, but once it's active, Erasure Ball gives you some serious power