Being able to pay three mana to cast anything from the graveyard for a turn essentially translates to drawing a huge number of cards at a very low cost, but without the randomness that comes with actually drawing the cards
Dusknoir can be obtained from Mega Rising: Mega Blaziken pack in the Mega Rising set
Specifically Elenda the Dusk Rose, Thalisse Reverent Medium and Tayam Luminous Enigma come to mind for this card, but this card will find a home in a lot of places as long as it fits into a backup plan or as a side piece to secure plan A with redundancy
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Build for a curve : The same can be said when adjusting your first hand, you should try to spread your card ink costs out, so that you have something to summon on each turn
, not many decks can make themselves known as Spright did when it first released