His third arm was no longer incomplete and it no longer continued to shake awkwardly.

The destruction he could carry out was different from the destruction that could be
created by the 103,000 grimoires.

He held the power to save the world.

He held the power at the core of a legend.

He was known as The One Above God.

If it was necessary, he could easily smash the no longer needed adaptor with an
overwhelming explosion of light that could turn an entire planet to dust.
It would have been odd if he could not.

“...?”

In that instant, what Fiamma of the Right felt first was not anger or fear. It was doubt.

There was not a scratch on the boy who should have been turned to ash.

In fact, the great swirl of light Fiamma had fired had split in two right in front of the boy
and scattered to either side of him. Yet that attack had held such power that it could
blow away a planet or recreate any of the legends in Christianity.

-Toaru Majutsu no Index Volume 22 Chapter 10 Part 3


His right arm altered the strength of the power it presented to match the strength of the
enemy he must defeat. And Fiamma had determined his enemy was World War III. In
other words, it was a great calamity that could destroy an entire planet contaminating
the surrounding area of space with a large amount of debris. By bringing together the
Star of Bethlehem, Misha Kreutzev, and the flesh-and-blood right arm that acted as a
container for Imagine Breaker, he should have succeeded in drawing out the proper
ability. Fiamma should possess the power to single-handedly claim victory over that
large war that was a mix of science and magic.

It was like the power to destroy all of humanity on the face of the earth. He was trying to
use that for the sake of salvation, but it would have been possible for him to bring an
end to human history if he used it in a certain way.

-Toaru Majutsu no Index Volume 22 Chapter 11 Part 3