If you manage to grow your graveyard large quickly and early, this is undeniably a powerful effect
When you can't find the cards you need to bounce them around for free lore and prizes, you should focus on your Resist cards and use Mouse Armor to give Resist to your vanilla cards like Prince Naveen and Lilo, allowing them to quest safely and forcing your opponent to overspend their resources to deal with them
Verhey says its a fun creative outlet compared to the more rigid nature of making real cards, and that other members of WOTC now even randomly send him funny ideas that hell often drop straight into the next Unknown card pool
When It's Brainstorm There is one Cantrip that plays differently from the rest of Cantrips
But don't sleep on that Treasure ability - when Goldvein Hydra dies, you get a number of Treasure tokens equal to its Power that can be used in so many ways
Sanctum Weaver Sanctum Weaver is an enchantment creature that taps for mana equal to the number of enchantments you control