In the late 37th-early 39th century, Boak was a synthcon and member of Clan Askani, founded by Rachel Summers. Mother Askani decided to fulfill the Askani'son prophecy and she and Boak sent a Sister Askani, who sacrificed her physical body to become energy and tasked with preservation of the Askani'son, to the past. Sister Askani arrived just as Apocalypse infected the infant Nathan Summers with a Techno-Organic Virus. Scott Summers reluctantly allowed Sister Askani to take Nathan forward to her time, to cure the virus. Upon baby Nathan's arrival, he was given to Mother Askani. Mother Askani placed Nathan in an incubation crib to preserve his life, but the virus had progressed too far. Fearing that Nathan would not survive the virus, Mother Askani had him cloned. Despite their original assessments, the Askani learned that the original child would live after all. Just then, the Canaanites attacked the base and Mother Askani ordered Boak to remove the children. Boak was only able to remove Nathan, when the Canaanites blasted their way into the room and seemingly killed the Mother Askani and killed Throeblood, as they began the massacre of the Clan Askani.
Years later, following the destruction of the Askani Sisterhood, by the New Canaanites led by Ch'vayre and Stryfe, and Apocalypse, by Nathan, Boak joined the Clan Chosen, an Askani-inspired team of freedom fighters, formed originally by Nathan Dayspring (as Nathan Summers was then called), Tetherblood, and Aliya.
