Maltic, Ingenious Chronologist

{w}{u}{b}{r}{g}: Search your library for up to five cards and reveal them. An opponent of your choice chooses four of those cards. Exile the chosen cards and put the rest into your hand. Then shuffle your library. If the cards revealed this way were all part of the same cycle of cards, that opponent chooses three cards instead. (If the cards revealed this way are part of the same cycle with ten cards, your opponent can only choose three of those cards.)