The Book Of Destiny

You have no maximum hand size.
Discard 3 Cards: Return target permanent to its
owners hand.
Discard 6 cards: Change the text of target spell or permanent by replacing all instances of one color
word with another.
Discard 9 cards: Target creature loses an ability another creature of your choice gains that ability.
Discard 12 cards: Search your library for a card,
put that card into your hand, then shuffle.