Abundance Scroll

You may only have two Abundance Scrolls in your library.
When Scroll of Rewriting enters the battlefield name two card types. You may move any number of cards from exile or library to your graveyard. Then those cards are returned to your hand. You have no maximum hand size and non-sorcery non-instant spells you cast cost {x} less where X is 1/2 your hand size. You may discard {x} cards and gain 1/2 {x} where {x} is the number of cards discarded.