Yes, they would get the job done. Fred hadnt seen anything like it before, but then again, he hadn't seen a lot of things that he had seen in Storybrooke before. Like zombies. He had seen zombie shows and movies since he had been in the town, but he had never experienced them firsthand before.
Fred had immediately set out once he had realized what was going on in the town, he didnt want to sit around doing nothing while the rest of the town was trying to defend itself. He didn't like feeling useless.
"Yeah. But after a few tries, I have found a spell that seems to work well on them. So I'm going to stick with that." He had first tried avada kedavra, but how would a killing curse work on something that was already dead?