Davriel, Shadow Consumed

0: Whenever you discard a card, put a loyalty counter on this planeswalker. You may discard a card. If you do, draw a card.
+1: Return a card from your graveyard to your hand then discard a card. You lose 1 life.
-7: Target player discard their hand, losses 1 life for every card discarded, and draw seven cards.