Etherium-Horn Sorcerer [Wizard]: If you leave the mana open, you can rescue it from getting destroyed
9.8 A purchased Lot shall be at the Buyer's risk in all respects from the fall of the Auctioneer's hammer whether or not payment has been made and neither the Company nor the Seller shall thereafter be liable for, and the Buyer indemnifies the Company against, any loss or damage of any kind, except where the Company (and its employees or agents) has not acted with due care and skill
This boosts Aqua Dragons attack by 1000 points (up by 500 for not being in Toon, which decreases its attack and another 500 for terrain bonus)
Control and combo decks can possibly dive into Emerald ink to use Fang as a location to keep critical characters safe and in play by granting them Ward and Evasive
Not only does this one do that, but it also acts as a sort of counterspell the same way a Dive Down (which is also in Foundations !) would
If this card inflicts Battle Damage to your opponent, decrease its ATK by 200 during your End Phase