Hammeroon was a Green-Lantern, inducted when Kyle Rayner attempted to revive the Corps. Originally a bounty hunter, Hammeroon saved Rayner from a telepathic predator; the pair then travelled to WayStation. Along the way, they retrieved an thawed Russian Cosmonaut Anya Savenlovich, and got into a brawl with Garl Rathbone. Brought before Judge Sool, Hammeroon and his compatriots were about to be sentenced to the RoundAway, when Savenlovich interrupted, threatening the court with a bomb. In truth, the bomb was a harmless piece of Hammeroon's ship, but the distraction bought the group enough time to escape.
Escaping to a samaritan house on the third moon of B'llth Nine, the group hoped to grab a meal and some sleep. Their respite was short-lived, however, as Sool arrived to bring the outlaws back to justice. Before he could, the planet was destroyed as a space/time anomaly washed over it, and it was only Rayner's quick reaction time in putting up a barrier that prevented the deaths of all concerned. Rayner offered them all a place in the new Corps, and they all immediately accepted.
The Van'n ImperiumEdit
Investigating the anomaly, the newly minted Green Lanterns came under attack from soldiers of the Van'n Imperium. Recognizing them, Rayner explained the situation to the rookie Lanterns, who were shocked to find out that the Imperium was led by fellow inductee, Magaan. The Corps attacked the Imperium, with Rayner assault the fleet, while Sool and the others attacked Magaan's fortress. Once inside, the group encountered Phothus, a disembodied brain created by Magaan to aid in his conquest. The fortress came under attack from Magaan's lobotomised soldiers, and it was only a matter of time before the walls came down. While the others went to disconnect an inhibitor device, Hammeroon left to deal with the soldiers. He fought bravely, but was crushed beneath a falling wall. After the battle was won, and the Corps had been disbanded, Rayner built a tribute to Hammeroon out of what was left of the fortress.