I thought the attribute field would end, but it didn't
Similar to what we saw from the Amber/Ruby deck, cards like Gadget Hackwrench Brilliant Bosun and Baymax Personal Healthcare Companion have abilities that are affected by having a certain classification of the card in play
For instance, in Standard there's a new Azorius enchantment deck seeing a little bit of play, and the card is also getting run in mono white token control (which has won out over the Boros version, much to my personal disappointment)
While its Defense is zero, it gives you a free body to make Link Plays with, or at worst, a body that can slow the opponent down
For example, the Professors Research card allows you to draw two additional cards on your turn whilst a Gym Leader card, such as Sabrina, allows you to swap out your opponents active Pokmon for one on their bench
It is pretty stupid when you can generate more mana on turn three than you need to cast every spell in your deck and that is the kind of thing a Priest can do