if ( rng().roll( nightfall_chance ) )
      {
        if ( p() -> double_nightfall == 3 )
        {
          p() -> resource_gain( RESOURCE_SOUL_SHARD, 2, p() -> gains.nightfall );
          p() -> double_nightfall = 0;
        }
        else
        {
          p() -> resource_gain( RESOURCE_SOUL_SHARD, 1, p() -> gains.nightfall );
          if ( p() -> perk.empowered_corruption -> ok() )
            p() -> double_nightfall++;
        }