The Chakra of Changes had a very powerful function to change the nature of things that came under its effect. It was a very interesting item and it's strength could vary greatly depending on who was using it.
But as this was a life bound object of this MAHARAGA being who was created as an ultimate fighter, then this item must also be perfectly suitable for its use.
Elena had no intention to kill or destroy this being. It was a weapon created by the will of the universe. So destroying it would be a major loss for the whole universe.
Currently this being had only managed to manifest itself here because of the sacrifice of that high quality treasure. But still, the amount of energy that this sacrificed item had provided was not unlimited.
So this powerful being was only able to stay here for a limited amount of time. For that reason, there was no need for Elena to defeat it. She just needed to keep it busy for some time and it would disappear from here on its own.
