Cormac Onslow Collins (b. 2006) attended Hogwarts School of Witchcraft and Wizardry from 2017 to 2024, and was sorted into Hufflepuff. He is the son of Alistair Collins and Princess Liala, and the grandson of King Cormac after whom he was named.
He is half-Leprechaun on his mother's side, and as such he is capable of affecting luck. As a half-blood, his ability is limited to making possibilities more probable, but he is unable to control the nature of those possibilities; when he alters chance, he changes "good and bad luck at the same time." He first demonstrated magical aptitude in 2013. At that time, while stuck in traffic with his father, he inadvertantly caused a series of traffic lights to simultaneously turn green. The incident caused a traffic accident in which his father was killed.
In November of 2017, Cormac was put under the Imperius Curse during a Quidditch match between Hufflepuff and Slytherin. He was able to break through the Curse, however, and was treated by Madam Pomfrey for mental exhaustion. His mother visited him in the Hospital Wing in a gweithiatal and pressured Albus Potter into agreeing to tell her who Imperiused Cormac, claiming that her ability to view the future let her see only that the culprit would cross Potter's path.