Lissandra, Arcadia's Empress

Hexproof, Changelling
When you cast Lissandra, Arcadia's Empress
choose a creature type.
When a creature of the choosen type or a Fairy
enters the battlefield, look at the top X cards of
your library where X its that creatures power.
Put one of them into your hand and the rest
on the buttom of your library at any order.