how much is terastal festival booster box (SV8a) and secret rares are what define a “High Class Pack” set SV8a Terastal Festival ex Booster

Even cutting some basic Forests for dual lands you'll still have many basic lands therefore consider some dual lands that care about basic lands

Main Deck 40 Grave Squirmer X DARK Level 1 [ Fiend / Effect ] ATK 0 DEF 0 If this card is destroyed by battle and sent to the GY: Target 1 card on the field

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Kitsa, Otterball Elite I can imagine other cards that look better in a prowess deck, but Kitsa, Otterball Elite is sneaky awesome

However, with so many cards from the archetype in Konami's duelling sim, it might be a little confusing putting together the best support set for the legendary dragon