Puella Magi Madoka Magica (2011)

S1E9 I'd Never Allow That to Happen

Sayaka's Soul Gem darkens into a grief seed, then cracks open to release a new witch. Kyoko, clutching Sayaka's lifeless body, desperately fends off the witch's relentless strikes. Just as the witch closes in, Homura slices through the labyrinth's walls, pulling Kyoko out to safety.