Black Sperm

Black Sperm is a Dragon-level monster and executive member of the Monster Association. His body is composed of trillions of individual cell-sized copies of himself that can merge, split, and reform at will. Each copy retains independent consciousness and combat ability, making him nearly impossible to kill — destroying his body only separates him into more copies. When merged into his ultimate form, Golden Sperm or Platinum Sperm, he becomes one of the most physically powerful monsters in the series.