Mahoromatic - Season 2 Episode 13 End of a Dream

Yuuichiro is planning to attend a party held by the Keepers. He was once friends with the leader, but believed that Vesper was the key to the future. However, he goes to the party with the intention of killing them. He prepares a battle plan with Slash. He brings his locket, and as the discussion heats up, Slash is summoned in full battle mode. Slash tears up everyone and everything in the place. However, due to the excess forces of the Keepers, Yuuichiro pays the ultimate price, but the Keepers seem to have been stopped. Meanwhile, Mahoro and Suguru escape to Bolivia. However, they are followed by Feldrance. Suguru is told to run to the nearest city, and Mahoro and Feldrance fight. As Feldrance's strength is continually increasing, Mahoro's is decreasing. So, she is forced to use her ultimate weapon, resulting in a double-KO.