The franchise mascot's gravitational pull on the secondary market is a constant in modern Pokemon collecting, and Crown Zenith gave Pikachu not one but two premium cards that have maintained their value impressively
This was the Pro Tour Collector Set , and featured cards with a completely different back, and a gold-bordered front, signed by each decks pilot for the first Pro Tour event
Id strongly recommend picking up at least one when you can, as it will likely be sought after for a long time
Ishgard, the Holy See is always worth including in a white deck, even with only a couple of available targets for the spell, but it gets more desirable the more invested you are in artifacts and/or enchantments
Songs are special Action cards that can be played like any other Action
It isn't as hard-focused on the mechanic as other archetypes, but its entire roster of powerful offense relies on it