Forest x15
While there are some of Azurite Sea's best cards in the Emerald/Sapphire decks, it's the way that every card, including the more cannon fodder characters, come together that makes it such a useful and powerful deck
UR Ultra Rare Cynet Conflict X TRAP Counter When a Spell/Trap Card, or monster effect, is activated while you control a "Code Talker" monster: Negate the activation, and if you do, banish that card, and if you do, your opponent cannot activate cards, or effects of cards, with the same original name as that card that was banished, until the end of the next turn
With a new fusion monster (that can also become a Super Polymerization target in the right meta!) as well as several support cards that flood the field with Knights from the deck, the deck not only serves as a formidable strategy on its own but can also be used to summon out the Egyptian Gods to send your opponent to the shadow realm like you never could before
(Quick Effect): You can target 1 face-up card your opponent controls
For four mana, getting to copy any creature you control while avoiding the Legend Rule is always strong, as you can double up on your biggest threat