Happy Birthday

Whenever you cast a noncreature spell, you may
pay X energy. If you do, double that number,
and look at that many top cards of your library.
Reveal any number of cards with the same name
as that spell, and put them into your hand. Put
the rest on the bottom of your library in any
order.
Happy Birthday to you! Happy Birthday to you! Ha
ppy Birthday to you! Happy Birthday to you! Happy