With the apocalypse a-foot, Jolly got called back to the place it all started, Egypt.
Anubis wanted to make a deal with Jolly.
There were too many wandering souls; Anubis needed them all.
He tasked Jolly with collecting them and in return, he would allow Jolly to ascend to the afterlife.
Jolly accepted and became the “Reaper of Souls”.