The French law of 2 August 2021 on bioethics removes the express prohibition on creating chimeric embryos. While it creates a new prohibition, that of modifying a human embryo by adding cells from other species, it authorises a contrario the modification of an animal embryo by adding cells from other species, including those from humans. The legislator is transgressing a taboo that was previously considered unalterable. It blurs the boundaries between humans and animals with a view to treating the former by perhaps eventually creating customised organs.The legislator's choice is to authorise a particular technique of chimerism with pluripotent stem cells, embryonic stem cells and induced pluripotent steam cells. However, there is no semantic reference to chimaerism in the law, the legislator merely sets out a definition of the particular prohibited manipulation and seems to reject any ontology of this artificially created living being to humanity. The disappearance of the term chimera is the flagship of the legal tools used by the 2021 legislator to achieve social acceptability of several techniques for creating chimeras.