how many copies of a card mtg the same can you have in commander deck? Multiple Copies Commander Legal? :

(Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Each enchantment card in your hand has miracle

Night's Whisper might do much the same for your card advantage situation for the mana and it wouldn't becomes useless as your opponent consumed their hand but that is entirely overlooking the disruption caused by discard

It starts as a 5/5, deals 5 damage to a player to mill five cards, and grows to a 10/10

10 Kinnan, Bonder Prodigy Get All The Mana Easily one of the most impressive commanders around, Kinnan, Bonder Prodigy is a bit of a value engine