What that means is up to the player's discretion, but for simplicity's sake it can be treated as working in the same way as the card access for Investigators introduced in Dunwich Legacy (five level 0 cards of any other class)
How to Craft Cards Beginner's Guides Frequently Asked Questions This article was created by Game8's elite team of writers and gamers
This can let you fill your own yard more quickly, in order to fuel Deadly Cover-Up
C Common Crystal Miracle X TRAP Counter When a Spell/Trap Card, or monster effect, is activated: Destroy 1 "Crystal Beast" card you control, and if you do, negate that activation, and if you do that, destroy that card
But if your deck supports the theme, perhaps because of a commander like Kalamax, the Stormsire, its an invaluable investment that takes over games in short order