1. This is an epic, not a legendary. Worse actual effect but retains flavor.
2. A two mans 2/2 is better than a 3 mana 3/2. It's actually a better body for cost, but a worse effect. Most of the time you will guess right, but where it's worse is that only one of the options will be a card they are holding, while lazul gets you information on more cards and let's you pick from more at the same time.
It feels in theme for priest, and any priest deck already running lazul is probably putting this in too.
I forgot she was 3 Mana, my bad.
It's just worse than a card that's already out.
Why is it a 2/2 then when Lazul is a 3/2?