The River Acheron

{u}{t} gain 1 life
{u}{t} Pay 2 life, create three 1/1 blue and red human creature tokens onto the battlefield
{u}{u}{t} Pay 4 life, sacrifice The River Acheron, Return the game exactly to how it was at the end of your last turn, except with The River Acheron still in your graveyard and with 4 life less than your life total at that point