"Samaritan, Part 2 of 6: Dark Alliances"
*At the outer boundary of our universe – the very edge of existence – Thanos has a fateful encounter with his lost love, Death, which causes him to reevaluate his goals and his approach to attaining them! *Source: marvel.com
Having met with Death at the Kyln, she confesses her love for him. Keeping this information in mind, Thanos is off to meet "The Maker."