Kaladesh library, Erasma's way

As an additional cost to this card, discard a card for each non-blue, non-colorless permanent you control
whenever you cast a blue spell you may pay {1}{u} if you do draw a card
{x}{x}{x}{u}{t}:Increase you hand size by X
{4}{u}{u}{t}: Sacrifice Kaladesh library, Erasma's way, search your library and for Erasma, Knowledge keeper and put him into your hand. ir your library was searched this way, shuffle it