The Multitude, one-million pointed spear or multispear is a weapon from the fifth dimension. Because of it extradimensional properties, the multispear manifested itself as a horde of cannibal angels in the three dimensional universe, at different moment of the times, a force named as the Multitude in the main universe. When the Multispear manifested in the 3-d universe destroyed 230 worlds, including Valeron, Metalek's world and Super-turtle's world at once from the 5th dimension point of view, but in the course of several years from the 3-d universe perspective. Only two worlds survived the attack of the Multitude: Krypton and Earth.
Feeling hatred for Mxyzptlk's success as the King-Thing Brpxz's new court magician and for the love he declared to Princess Gsptlnz, Vyndktvx stole the Multispear from Chromo-Conflict 2, along with the Nothingcoat and the Imaginator. Sneaking up on Mxyzptlk behind a drape, he struck him with the Multispear but unbeknown to him it was the King-Thing trying on Mxy's derby hat. The moment he killed the King-Thing, 230 worlds died instantly with only a few of them encountering resistance. Krypton was presumably one of those worlds as it's been said Jor-El was the only one capable of repelling the Multitude.
Mission To Mars
During a mission to Mars, the Multitude struck the colony there in its 3-Dimensional form. Superman came to the rescue but after a failed attempt against it he figured out the way to eliminate the threat. Giving a simple explanation with the use of a fork, he explained that even though the fork is a solid object in three dimensions, when pressed against a surface it leaves 4 distinct points. The same thing happens when the Multitude is struck from the 5th Dimension. One weapon with a million points attacking everything at once.