Ro, Paragon of Hopelessness

Hexproof
When Ro deals combat damage to an opponent, you may look at the top 3 cards of any number of target player's libraries. Reveal any number of cards with total converted mana cost less than or equal to Ro's power you looked at this way, put those cards into their owner's graveyards.
Ro's power and toughness are each equal to the number of cards in all graveyards plus 3.