The lance of the head Norse god was named Gungnir. Its handle was made from the wood of an ash tree, the same as the world tree, its sharp tip was made from gold, and it had tremendous power due to the runes personally carved into the Dvergr-made base by the head god.

It had a few different characteristics.

1. The lance was made to be thrown.

2. The lance would always hit its target once thrown.

3. The lance could not be shot down or destroyed mid-flight.

4. The lance would always return to its owner’s hands after piercing the target.

[...]

And even with all of those characteristics, the lance of the head Norse god had yet another characteristic that put it a clear step above the weapons’ of the other gods.

5. That lance would destroy the symbols of human power.

That came from when Gungnir had broken the legendary sword wielded by the father of Sigurd the hero. When necessary, the head Norse god would take power from humans, implying it was their time to die, and add their soul to the army of the gods.

A human could not defeat a god.

The convenience of the god had priority over everything in the human’s world and the workings of the world would act accordingly.

No other characteristic felt more strongly like the power of a god.

Rather than showing simple destructive power by blowing away a mountain or vaporizing the sea, it bluntly indicated the precedence of the god.

In other words, the instant that lance left Othinus’s hands, the world would be blown to pieces.

[...]

As the lance was fired with tremendous force, the “happy world” was smashed to pieces as if space itself was being torn apart. As a fragment of the world approached with the force of a raging wave, it took on the shape of a giant lance. The walls of all the phases were crushed, transformed into a swirl of deadly weapons resembling sharp shards of glass, and approached their pitiful target as if to swallow him whole.

Everything was ripped up.

The black labyrinth, which had used up all of its possibilities, showed itself.

[...]

Most likely, no one could have escaped that lance when attacked head on. No matter what form of defense or evasion they attempted, they would have had no hope of surviving. That attack had been given the parameter of “no human can oppose it”. Unless one left the territory of man, one would be smashed to pieces. Not even Fiamma of the Right or Ollerus could have done anything when faced with it.

Toaru Majutsu no Index New Testament vol.9 ch.8 pt.7