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"Hey, Hyrule."
Hyrule looked up from the strands of grass he was working on weaving together to pass the time. "Four. What's up?"
Four sat down next to him against the barn wall, stretching out his feet in the shade. He lowered his voice, watching Twilight and Wind splash each other in the river a distance away. "I want to warn you."
"...warn me?" Hyrule set the grass aside, feeling chilly. "About what?"
"Nothing dramatic, don't worry. You don't need a weapon," Four laughed. "No. It's just that… well… Wars's new knife is… bad."
"Bad?" Hyrule asked slowly. He stopped reaching for his sword, but he remained tense.
"Well, for one, it isn't great quality," Four said. "It isn't steel like the merchant said, just mostly iron."
Hyrule made a face. "Iron?"
"It's an awful material to make knives out of. It's too brittle. It isn't even pure iron, so I'd have to purify it if I wanted to do anything with it." Four shook his head. "Warriors was disappointed when I told him. I don't know how he picked out the worst quality metal I've seen in a while, but he did."
"Why are you… warning me?" Hyrule asked slowly, still not quite relaxing. "I don't really care what Wars's knife is made out of."
Four sighed and looked at Hyrule straight on. "I only work with iron when I have gloves and an apron on. Otherwise, it would hurt. You probably think you're being subtle, but I can tell it would hurt you, too."
Hyrule's eyes went wide, and he felt somewhat foolish, and a little offended. "I think I'm being subtle? How—"
"Hyrule," Four said, a bit of a smile on his face. "I'm sorry for being circumspect. Look. I can tell you're fey. You hide it, but I can tell, because I am, too."
"You are?" Hyrule's thoughts ground to a halt, and he blinked at Four. He'd always noticed that Four's magic had a bit of a different flavor to it, but he had chalked it up to the Four Sword being odd.
"Yes. Be careful around Wars's new knife, all right? You wouldn't want to get hurt." Four stood up, gave Hyrule a smile, and wandered off, as if he hadn't just upended Hyrule's entire view of the universe.
…Hyrule should really look into those magic auras a bit.