Percy training Magnus

Jack often bragged that he was the sharpest blade in the Nine Worlds. He could cut through anything and fight a dozen enemies at once. I tended to believe him, since I’d personally seen him take out giants the size of skyscrapers. Yet the goat-killer was having no trouble forcing him back across the roof. The assassin might have been small, but he was strong and quick. His dark iron sword sparked against Jack. Every time the two blades connected, Jack yelped, “Ow! Ow!”
I didn’t know if Jack was in real danger, but I had to help. Since I didn’t have another weapon and I didn’t feel like fighting empty-handed, I ran to the nearest lamppost and ripped it out of the cement.

HoT ch.2

Sam,” I said, “if you’re just trying to show him proof of weirdness, bust out your blazing spear. Fly around the roof. You can do a million things—”
“None of which are meant to be seen by mortals,” she said bitterly. “It’s a paradox, Magnus. I’m not supposed to reveal my powers to a mortal, so if I try to do it on purpose, my powers won’t work. I say, Hey, look at me fly! and suddenly I can’t fly.”
“That doesn’t make any sense,” I said.
“Thank you,” Amir agreed.
Sam stomped her foot. “You try it, Magnus. Show Amir you’re an einherji. Jump to the top of the Citgo sign.”
I glanced up. Sixty feet...tough, but doable. Yet just thinking about it made my muscles feel wobbly. My strength abandoned me. I suspected that if I tried, I’d hop six inches and make a fool out of myself, which would no doubt be very entertaining to Halfborn and Alex.
“T see your point,” I admitted. “

Hot Ch.30

As much as I appreciated him coming up from New York to offer me heroic aquatic-survival tips, though, I was getting tired of failing...

I’d swallowed several gallons of seawater trying to hold my breath, and learned that I was no better at hand-to-hand combat thirty feet down than I was on dry land.
This morning, Percy had walked me around Old Ironsides, trying to teach me the basics of sailing and navigation,

SotD ch.1