This set added more myriad creatures and introduced cards that spread the ability to other permanents
Playability drives demand
If you somehow visit Swinging Ship after the first combat phase of a turn has ended, it won't have any effect
Mason wants us to evolve our Goldeen into Seaking (recall we had the Seaking card in our initial hand) and then attach a psychic energy card to Seaking, which, when combined with the water energy card we attached to Goldeen in turn one, allows Seaking to use its Waterfall attack
Ruby ink cards are designed for a more aggressive play style, offering stronger defense, higher attack, and abilities that boost these stats in other cards while also adding Lore tokens
Add in enchantment cards like Exquisite Blood and Sanguine Blood to increase the potency of his first ability