Boon of Ichha Mrityu

Bhishma then approached Satyavati , bowing down before her with folded hands, asked her to accompany him and take her place in Hastinapur.
Climbing Bhishma's chariot, both reached Hastinapur.

All greeted them with the chants of Bhishma. Bhishma presented Satyavati to his father. Greatly pleased, Shantanu blessed his son with the boon of dying once when he wished to.