>>281982114
His ass. It's clear from Yoshida's narration that he accepted " a new role", and for this sting operation in particular he acted as a "switch". Yoshida claims this role is " a pretty good role", which means it gives him power and a good outcome, so nothing where he'd need to sacrifice his own life, obviously.
Usually when things are foreshadowed, they appear 4-10 chapters afterwards. That turned out to be the case when Denji mentioned Fire devil, and voila 10 chapters later he appeared. Nuke was mentioned 5 chapters ago, and it's only logical he'd play a role in the fight between War and Death. Since Yoshida bloody exploded with a cocky grin on his face, it's obvious to me he must have contracted himself with the Nuke devil.