Stress testing

Since this was just a test to see how things would go, he wanted to see just what he could get Lucy to do.

"Alright, Lucy. We're gonna have a little fun. I wanna see what I can make you do for me"

"What do you mean, Master?" She questioned "I'll do anything you want."

Natsu smirked

"I know. But I don't know how much magic energy certain things will take up. So I'm doing a little testing."