Aria Thane, Mental Prodigy

You have no maximum hand size.
Whenever you discard a card, you may put it on
top of your library instead of into your graveyard.
Remove X quest and/or charge counters from
among permanents you control: Reveal the top
card of your library. If it's a permanent with
converted mana cost X or less, you may cast it
either without paying its casting cost or for any
alternate cost it has.