All the summons that Elena had were growing and becoming stronger at their own pace. Amongsr those summon, her good spider buddy Ariana was growing into something very powerful. Elena was really excited to see what kind of being would Ariana turned out to be.
But as Ariana was already above level 3000, a high level world was not suitable for her growth. Elena could have continued to raise her level by creating opponents for her but this method was not really suitable to create a truly strong being.
If Ariana wanted to grow and evolve, she needed to struggle. From her own experience, Elena was aware that without some hardship and struggles, gaining real strength was extremely hard.
