Board Thread:Lore Discussion/@comment-10407900-20140914234758/@comment-3492791-20140915002627

Not sure what information you're saying is infering that, as of the two occations we know of where the Flame was rekindled niether used all of the Lord Souls, or even one complete Lord Soul actually. The information the game tells us is that someone must offer their own soul as kindling to the Flame.