Thor was born in Omaha, Nebraska to South Sudanese parents and moved to Anchorage, Alaska at age five.

[2] At age 14, Thor moved to West Virginia, where his brother lived, to attend Huntington Prep School.

[6] He was a consensus four-star recruit and committed to playing college basketball for Auburn, choosing the Tigers over Oklahoma State.

[7] On February 13, 2021, Thor recorded a freshman season-high 24 points and nine rebounds, shooting 5-of-6 from three-point range, in an 82–80 loss to Kentucky.

[15] In his G League debut, Thor posted 34 points off of 14-of-22 shooting and grabbed 12 rebounds in a 128–117 loss to the Birmingham Squadron.