When did she learned to do that

Elena had already seen a city in near collapse state because of the aftermath of the battle that night.

Though, Elena didn't want others to suffer, and tried to keep the damage as little as possible, but it was impossible for her to stop all casualties.

When Elephants fight, it is inevitable for the ants to die under their feet. So, try as she might, in a underdeveloped place like this, it is inevitable that the weakling would suffer without the protection of the strong.

Such collateral is happening here right now as well.

Due to the supernatural phenomenon caused by Elena and others the whole mountain range and the forests surrounding it got shaken up.

Hordes of spirit beasts ran out of the forest because of fear. The number was so great that it created a stampede of monsters.

The city has its walls and guards to save civilians from such disaster. But this is not a city.