"Classic Sixth Edition", +m/(cards\sin\s.*hand|each\scard\sin\syour\shand)/, +!hellbent (2)
Maro's power and toughness are each equal to the number of cards in your hand.
At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.
Gatherer works better in the Companion app!