A normal person would most probably take the decision of slowing down a little bit with their progress at this point of time. It was very unwise to become enemies with the people who were basically the strongest of this universe. But, was Elena a normal person ? Would she be willing to slow down her progress because of an outside threat ?
This derivative concept that she was planning to create was not an essential part of her strength. The cards in her hands would increase with the addition of this new tool but that would not make Elena much stronger than her current self. That was because this derivative concept was not the strongest card in her hands.
In that case, being cautious with this ability would have been a very wise choice. There was also no essential need of this. But still, the decision Elena made was to continue what she was doing without stopping.