If you don't care about life at all you are likely a super aggressive deck, likely red, or some kind of a combo deck and you should consider playing Searing Spear instead of Lightning Helix as it will increase your consistency
Divine Intervention The ultimate If I cant win, nobody can card, and one of the only two cards in all of Magic that can explicitly end the game in a draw
(2018-10-05) If Midnight Reaper dies at the same time as one or more other nontoken creatures you control, Midnight Reaper's ability triggers for each of them
Its still pretty deece Duel Commander, though
Pretty useful in, hmmm, I dont know Nekusar
Players can't lose life this turn and players can't lose the game or win the game this turn