Answer:
The terrible oracle that was delivered to King Acrisius was that the son of his daughter would be the cause of his death.
Step-by-step explanation:
King Acrisus did not have a son to be his heir and this worried him greatly, so he went to the oracle Deslfos, who gave him the terrible prophecy that he would be killed by the child to be born of his daughter Danae. Terrified, Acrisus imprisons Danae in a bronze chamber to prevent her from getting pregnant, but Zeus enters the chamber in the form of rain, and causes Danae to get pregnant. Danae's son is the Greek hero Perseus.