Mordenkainen (it)

Legendary Planeswalker - Mordenkainen | Loyalty: 5 (CMC 6)
+2: Draw two cards, then put a card from your hand on the bottom of your library.
-2: Create a blue Dog Illusion creature token with "This creature's power and toughness are each equal to twice the number of cards in your hand."
-10: Exchange your hand and library, then shuffle. You get an emblem with "You have no maximum hand size."