Jace, Hunted Seeker

Hexproof
Whenever you are dealt combat damage, if you have 4 or more cards in your hand, prevent that damage.
Whenever you cast a spell for its madness cost, draw 2 cards.
Discard a card: Tap target creature. It doesn't untap during its controller's next untap step.
At the beginning of your upkeep, if your opponent controls 7 or more untapped creatures, sacrifice Jace.