Self Destruct Letter

P.S. This letter is made to self-destruct after it has been read. Even if you had realized
the truth, you need to be punished for making that bet without consulting us. I hope
this blows off a finger or two of that precious right hand of yours.
After all that, one of Stiyl’s runes was carved into the paper.
As soon as Index frantically threw the letter away, it burst into pieces with a crackling
Noise.

- Toaru Majutsu no Index Volume 1, Epilogue