When Protean Hulk dies, search your library for any number of creature cards with total mana value 6 or less, put them onto the battlefield, then shuffle.
When Protean Hulk is put into a graveyard from play, search your library for any number of creature cards with total converted mana cost 6 or less and put them into play. Then shuffle your library.
"Meat *and* eggs. We eat!"
—Borborygmos