It lets you see the microscopic fingerprints of authentic printing that counterfeiters struggle to replicate
While I think you should genuinely encourage opponents to concede once the prison effects have stacked up enough, its still polite (and tactically sound) to have a way to win games under your own oppressive regime
Unless something from Bloomburrow ends up being better, this would be the most powerful squirrel to build a deck around
You can also get characters costing two ink or more to sing song cards Ive Got a Dream or Go the Distance to ready up Maui, Whale without having to pay the ready up cost or the cost of the song Youll want to do this because Maui, Whale has a gigantic eight willpower and eight health, which can be used to smash into opposing characters through challenges, proposing a serious threat on the battlefield and potentially shutting down enemy strategies involving key characters.
Cage covers our bases for Goblins, Uro, Titan of Nature's Wrath, Collected Company, and a ton of other decks