User blog comment:Leek0421/The strongest Female Fairy Tail wizard/@comment-112.203.179.223-20150512141443/@comment-96.24.244.24-20150515145643

It takes a lot of magic to summon the CSK which is why Aquarius said if Lucy can handle opening 3 gates at the same time she should be able to handle CSK summoning. Lucy using her own magical power summoned the CSK.

The first time Lucy couldn't move it had nothing to do with her magical power it was because her leg was broke. Ergo in that panel when ashe tries to move it shows steam coming off her foot. Also Aquarius was still out and if Lucy didn't have any magical power Aquarius would have disappeared. Now when she got Aquarius Mode some people speculate 2 different things some people think the CSK gave Lucy's Aquarius Magical reserves as well as her power while some think Lucy only gained Aquarius water abilities.