Baikehr, Dark Assistant

+1: Discard a card. Baikehr deals damage to any target equal to half of that card's mana cost rounded up.
-3: Discard a card. Baikehr deals damage equal to that cards converted mana cost. Draw a card.
-11: Discard your hand. Baikehr deals damage equal to the total converted mana costs of those cards. Draw seven cards.