I'd Never Allow That to Happen Mahô shôjo Madoka magika: Puella Magi Madoka Magica : Season 1 Episode 9

Sayaka's Soul Gem turns into a jet-black grief seed, which hatches and a new witch emerges. Carrying Sayaka's body, Kyoko focuses on defending against the approaching witch's attacks. Homura cuts into the witch's labyrinth and leads Kyoko to escape.