5 Brightstone Ritual According to the flavor text, powerful wizards and other spellcasters covet that stone, but Goblins love how shiny it is, and this card is indeed much better for Goblin tribal decks than Wizard decks
This stack of 15 cards maximum acts like well, an extra deck
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Not for every deck, but it can be an amazing build-around
Wish you the best if youre still thinking of selling
And there are no particular downsides on that card aside from being a mythic rare
