Gnarya, Thief of Thoughts

Whenever an opponent discards a card you may
return target instant or sorcery from your
graveyard with lesser converted mana cost from
your graveyard to your hand.
At the beginning of each opponents upkeep, that
player loses 1 life for each card less than seven in
their hand. If that player lost 4 or more life in
this way, draw a card.