“Warning: Chapter 2, Verse 6. The loss of the life force known as mana due to blood loss has exceeded a certain amount and John’s Pen[a 28] is being forcibly awoken. …If the current situation persists, my body will lose the bare minimum of necessary life force and expire in about 15 minutes according to the international standard minute defined by the clock tower in London. It would be best if you followed the instructions I am about to give in order to perform the most efficient treatment.”

[...]

A silent chill ran down Komoe-sensei’s back as she heard the dripping of blood coming from the girl’s back.

“W-W-Wh-What is this?”

“Magic.” Index paused after that one word. “I will now need your help and your body. If you do as I say, no one will meet any misfortune and you will not be the target of anyone’s resentment.”

[...]

“Chant. It will be over with just a bit more.”

The sharp order refused to let Komoe-sensei lose her composure despite her rising confusion and flagging thoughts.

Index, Komoe-sensei, and the two figurines on the tea table sang. The back of Index’s figurine on the table began to melt.

[...]

“Don’t worry.” Index looked about ready to collapse even then. “It’s like a cold. You need your own strength to get better. The wound itself has been closed up, so I’ll be fine.”

Toaru Majutsu no Index vol.1 ch.2 pt.1