The Kugelblitz is a concentration of heat and light so intense that it became a type of black hole. It was caused when Harlan created a burst of energy in grief over his mother's death that killed 27 of the 43 women, causing a Grandfather Paradox. The Kugelblitz killed Marcus, Fei, and Christopher. Number Five saved Ben before it could kill him as well. The Kugelblitz can destroy and manipulate time and space at a very extreme level.