I took the liberty of digging up a link to the complete story, for anyone not familiar with it:

BRAVE AND THE BOLD 108, "The Night Batman Sold His Soul", 23 pages, Aug-Sept 1973.
https://comiconlinefree.com/the-brave-and-the-bold-1955/issue-108/full


While the story could be argued to have skillfully left elements at story's end unresolved to conclude with an air of intriguing enduring mystery, for me it felt a bit incomplete.

The two BRAVE AND THE BOLD stories I liked best from that period were:
Issue 104:
https://comiconlinefree.com/the-brave-and-the-bold-1955/issue-109/full
A BATMAN/Deadman team-up, the first after a Jack Kirby Deadman re-boot in FOREVER PEOPLE 9 and 10.
And after Kirby's abortive effort, the next appearance of Deadman here in B & B 104 takes a turn back to a more Neal Adams-patterned Deadman. And Aparo became the dominant artist on Deadman for nearly 20 years.)

And issue 109:
https://comiconlinefree.com/the-brave-and-the-bold-1955/issue-109/full
A Batman/The Demon team-up. The opposite of the Deadman story above, this one was very consistent with Kirby's work on THE DEMON series. As with Aparo's work on Mister Miracle and Kamandi in later issues, Aparo with this story demonstrated himself the best artist, pretty much the only artist for a long time, to produce non-Kirby stories that were consistent with the Kirby canon.

Neither of which are "deal with the devil" stories, but still good issues.