Being able to cast merfolk off the top of your library gives you extra resources to use each turn and works with any merfolk kindred spells like Merrow Commerce
These changes will affect any format where these cards can be played (Historic, Historic Brawl, Direct Challenge, etc.)
Collector's guides: Collector's guides, such as the "Pokemon Collector's Value Guide" by CheckerBee Publishing, can provide information on storage methods and best practices for preserving your collection
It gives fans another adaptation of some of their favorite memories from the books or movies, and is inherently cool to collect
Of course, this doesnt mean our mana is good
It won't count copies that were put directly onto the stack without being cast, such as the ones storm itself creates