Bocrivel's Masterpiece

Players play with their hand and top card of their libraries revealed. Players have no maximum handsize. During each upkeep each player draws 2 cards. During your upkeep all opponents discard their hand. For each card in your hand over 7 at the beginning of your end step you lose 1 life, you may discard any amount of cards equal to the difference to negate life loss dealt this way.