You don't lose the game for having 0 or less life.When you have 20 or more life, you lose the game.Whenever you lose life, you gain 2 life for each 1 life you lost. (Damage dealt to you causes you to lose life.)
FlyingThreshold — As long as seven or more cards are in your graveyard, Boneshard Slasher gets +2/+2 and has "When Boneshard Slasher becomes the target of a spell or ability, sacrifice it."
Whenever Grotesque Hybrid deals combat damage to a creature, destroy that creature. It can't be regenerated.Discard a card: Grotesque Hybrid gains flying and protection from green and from white until end of turn.
FlyingThreshold — As long as seven or more cards are in your graveyard, Gloomdrifter has "When Gloomdrifter enters, nonblack creatures get -2/-2 until end of turn."
Whenever Carrion Rats attacks or blocks, any player may exile a card from their graveyard. If a player does, Carrion Rats assigns no combat damage this turn.
Psychotic Haze deals 1 damage to each creature and each player.Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)