“Warning: Chapter 35, Verse 18. Five seconds until complete activation of Sulfur Rain will Scorch the Earth.”

Orange arrow-like objects that held a scorching heat rained down.

It was not just a few.

Almost 50 arrows appeared from near the ceiling and fell down toward Kamijou like a hanging ceiling.

[...]

Orange arrows pierced into the floor right next to the boy and the stone shattered. The sharp fragments struck Kamijou’s body as he moved backwards and then stood up on his feet.

Toaru Majutsu no Index vol.22 ch.9 pt.2