If they don't know your strategy, you could try and fool them, or just pick three super-cards and watch them struggle to guess which one is least dangerous
But her tap ability gives a target creature all colors until the end of the turn
(2008-10-01) If you don't reveal the named card (perhaps because it was in the top six cards of your library), you'll end up exiling your entire library
In Mono-Blue, the number of options that work with this kind of strategy are limited enough that I decided to leave most of those self-milling Zombies out
The card is great, plain and simple
Emberheart Challenger also has the Valiant ability, which states that whenever it's targeted by a spell or ability you control for the first time in a turn, you exile the top card of your library and can cast it until the end of that turn