Joseph, Awaited Hero

+2: Draw a card. Until your next upkeep, you have no maximum hand size and mana doesn't empty from your mana pool as steps, phases, and turns end.
-X: Target player exiles the top X cards of their library. For each nonpermanent spell exiled this way, put a loyalty counter on Joseph.
-16: You get an emblem with "Once per turn, you may play a card in a graveyard, exile, or your sideboard without paying its mana cost."