Start simple

Natsu wanted to start small.

He had a general idea of how spirit keys worked: and they used up a lot of magic energy. He knew he only had a set amount of time with a woman he summoned, that their time would be limited based on power, and that summoning multiple women would be... Problematic.

So, he figured he'd start easy to test his limits.

"Heh. Open, gate of the Blonde Bimbo! Lucy!" He boomed.

A gate opened in front of him, as Lucy stepped out, wearing only a towel around herself . She crossed her arms and sighed

"What is it Natsu? I was just about to take a nice, long bath" she huffed.