Hal Jordan was sent by the Guardians of the Universe to locate Davo Yull after the Green Lantern of Pharma had failed to report to Oa.
Jordan first went to see Yull's wife, who had last seen her husband before he went off to stop deadly ground quakes which had originated in the Misty Sea.
Jordan fund Davo Yull, who had been weakened by several days without food or water. Yull had been stopped by a pulsator, a weapon created by Thraxon the Powerful, a warrior bent on conquering Pharma. The pulsator would drain the power rings of any Green Lanterns in proximity.
Utilizing a Pharman sea creature as a shield, Jordan managed to destroy the pulsator. He defeated Thraxon, and rescued Davo Yull.
[Green Lantern Vol. 2 #50]
The next time Jordan heard of Davo Yull, it was less fortunate. A group of cosmic criminals had escaped captivity on the Guardians' Prison Planet, and launched an attempt to destroy the Corps. Davo Yull and Chogar of Tyrea were among the thirteen Green Lanterns killed by their plan.
[Green Lantern Vol. 2 #55]
Davo Yull is memorialized in the Crypts of the Green Lantern Corps on Oa.
[Green Lantern/Sinestro Corps: Secret Files #1]
Script: Gardner Fox
|CREATIVE TEAM (First Appearance)|
Art: Gil Kane
Edits: Julius Schwartz
In the story, Yull's sector is listed as 23KT45. In keeping with the 0-3600 registration system, I shortened it to 2345. Perhaps the KT designates Pharma.