Each booster contains twelve randomized cards: 6 common cards, 3 uncommon cards, 2 rare, super rare, or legendary cards, 1 foil card (random rarity level).
That brings evolve to just 16 cards in three colors, mainly blue and green
A card like Hall of Storm Giants is a nice blue finisher, while Lair of the Hydra shines in green devotion decks as a big threat later in the game
(2025-06-06) Vanille's second ability checks the battlefield at the moment it would trigger to see if you own and control Vanille and a creature named Fang, Fearless l'Cie
This means that every single creature in your deck works with Prosperous Thief, Ingenious Infiltrator, Yuriko, the Tiger's Shadow, and Kaito, Bane of Nightmares, which is a pretty significant power-boost to the non-ninja creatures in your deck
Since its 1999 release, Yu-Gi-Oh