Andre Frost and his daughter, Carmilla Frost, were captured by the Martian Masters. They apparently spent some amount of time experimenting on Andre, before they wrapped him in their tentacles and crushed the life from him. Afterwards, they locked Carmilla in with his body, wanting her to clone him. She did so, but apparently some time passed before his cells were harvested. As a result, his cells had deteriorated somewhat, and the clone she created was less than identical. She named her bestial creation Grok.