The Misfit Of Demon King Academy Ep 7 - F2F Transformation

Episode 7 Mother's Words
Afterward, he angrily teleports Emilia to the Arena, where he stabs her with a sword, inflicting a mortal wound. He humiliates her by making her beg for her life and having her openly acknowledge him as the true Demon King of Tyranny. He then kills her for not being true to her acknowledgment. He immediately uses Azheb to resurrect her as a hybrid in order to see this country from a different perspective. He also curses her so that she will always be resurrected as a hybrid when she dies.