User blog comment:Carebearheart/Female Dragon Slayers/@comment-125.212.122.110-20150130123356/@comment-9595671-20150202133326

While that sounds like a neat idea, I can't help but feel that would make her OP.

Remember that she can get the rain to fall from her own magic if she wanted, that would kinda give her unlimited access to water to recharge her powers.

You know, I think maybe that's why the closest thing to a rock dragon slayer is Gajeel. Because rocks are too common as well, and we all know Wendy's balanced by the air quality and how she's not as strong and she's not fond of fighting.