Soul Eater Episode 19

Synopsis
Set in the Shinigami technical school for weapon meisters, the series revolves around 3 groups of each a weapon meister and a human weapon. Trying to make the latter a "Death Scythe" and thus fit for use by the Shinigami, they must collect the souls of 99 evil humans and 1 witch.
Soul Eater is an anime that centers around meisters and their weapons and their mission to collect 99 evil souls and 1 witch soul. Upon doing that the meister's weapons will become a Deathscythe, which is the highest title for a weapon. Maka, Soul Eater, Black Star, Tsubaki, Death the Kid, and Patty and Liz Thompson are the characters Soul Eater revolves around. Besides taking the time to gather souls these students of Shibusen defend Death City from some of the most powerful of creatures while still attending school and trying to become stronger.

Epiosde 19 - "Underground Battle Starts: Breakthrough, Medusa's Vector Arrow?"

Shinigami discusses the origin of the Kishin Asura along with Sid and everyone else, as the group underground is intercepted by Medusa. She will not let them pass that easily, and deploys one of her techniques, the Vector Arrow. However, it will not prove enough, as everyone goes through, except Stein, who stays behind to fight the witch. Death the Kid quickly goes through Crona, but Black Star is ready to fight as he reaches it. However, a determined Maka convinces him to let her take his place.