UW Tron and 4C Gifts are two exceptions to this, although there is probably some unexplored space with other decks as well
Form of the Approach of the Second Sun works in a way similar to Form of the Dragon, except this time you turn yourself into a card and get shuffled into your own library, forcing you to balance some cards on top of your head
In theory, you could cast off an entire hand of spells, discard a hand of zero cards, and still restock your hand at your end step
(Note: I didnt count basic lands, which would skew that percentage even higher.) Thats a high number, but not surprising
If youre forever wishing you could sneak just one more card off the top of your library each turn, this might be a solid choice
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