Elena slashed the black fan in her hand and a spatial rift appeared before her. This rift was actually more stable than the one created by Lifua. From this Elena judged that the power of her fans was about 60 percent as strong as the real ones. The only reason why Elena's spatial rift was more stable was because her understanding of the concept of space was better than Lifua's.
But still Elena was very satisfied with these fans of hers. They were still not good enough to be usable in high level battles but Elena judged that if they could reach about 90 percent potential of the real ones and she herself could deepen her control over these items, then they would definitely be useful in battles of her own level.