Attack on Titan season 3 episode 9 Ruler of the Walls
Erwin justifies his decision not to evacuate Orvud District due Abnormal Titans targeting populations and decide to instead lure the Reiss Titan into a trap, with the first line's cannonfire having little effect while Eren punishes himself for being too weak, just being influenced by events around him. The Reiss Titan eventually reaches the wall, its face and chest having eroded from crawling for miles on the ground. The Scouts then implement their own plan; Eren assuming Titan form and plunging several barrels of gunpowder into the Titan's gaping mouth to destroy its body while the others quickly destroy the fragment holding Rod before he regenerates. Historia succeeds in killing Rod, seeing some of his memories before the explosion throws her into the city street. Historia recovers from her fall and formally introduces herself to the gathered civilians as the true ruler of the walls. Back at the Reiss estate, his group having all died in the cave-in, a dying Kenny recalls events in his past before being found by Levi. While Levi notes Kenny's fatal injuries, the older man reveals to have acquired a syringe of Titan serum.