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Yuna, Hope of Spira is a 3/5 mythic rare cleric that costs three colorless, one green, and one white mana

Mega Dream is an electrifying special expansion in the Scarlet & Violet Series

Includes a full-art foil promo card featuring Team leader - Blanche, a deluxe pin featuring the emblem of Team Mystic and 6 Pokmon GO booster packs

They allow you mainly to play cards from your hand but also they act as boosters to characters when you battle

You can cast this as early on the first turn for getting a basic land that you need, and you can cast this later for Diabolic Tutor mana to get the best card for your library

Pictures are for reference and example only