Chrono Phantasma
During his travels with Platinum, Bang was informed by Trinity about Kushinada's Lynchpin, although she could give him little information. After a month of travelling through the Ikaruga Region with Platinum, the two of them arrived in the 8th Hierarchical City of Wadatsumi, where they found Carl with Nirvana. He was pleased to see them both and asked how they were doing. The three of them separated, each heading to a different Hierarchical City, although Bang stayed in Wadatsumi to search for the Lynchpin.[6]
Kagura later contacted Bang and the two of them met at a field in the dead of night. Although Bang resented Kagura for having fled during the civil war and for “turning traitor” against Tenjo, he still agreed to meet since the Black Knight had information on Kushinada's Lynchpin. They met and Bang learned the truth, being reintroduced to Homura Amanohokosaka, Tenjo's child who Kagura had been protecting since the war. Overjoyed, Bang's friendship with Homura and Kagura was rekindled and he was ordered to go to the Wadatsumi Castle basement where he would wait for someone to help him with using the Rettenjo.[7]
Eventually, Ragna, Noel, and Celica A. Mercury arrived at the Wadatsumi Castle where Bang was waiting. He battled Ragna and determined that the Grim Reaper had a true understanding of power and how to wield it, so he lent the group his strength and the use of the Rettenjo. Celica asked that he hammed it into the Lynchpin and, should that fail, that she should be used instead. Although this confused him, the group did not have time to discuss the matter as Relius, Litchi, Ignis, and Nu-13 arrived to complicate matters.[8] Makoto and Tsubaki Yayoi arrived to back Bang up in the fight, but he was shocked when Carl arrived and joined his father – Bang was in anguish as he had to fight against both Litchi and Carl. Tsubaki and Makoto made his job easier and he took on Relius by himself, dividing the fight because of the deadly teamwork displayed by Ignis and Nirvana. Bang later received a call from Ragna telling him that he had only 10 minutes to activate the Lynchpin, or everything would be lost, so the ninja redoubled his efforts.[9]
Thanks to the arrival of Valkenhayn, Bang was able to get atop the Lynchpin, which Rachel teleported above the Monolith in Ibukido. On Tager and Rachel's instruction, Bang jumped into the air and hammered Rettenjo as hard as he could into the Lynchpin, making it fall into the Monolith and thus disrupting the flow of seithr across the world.[10]