Win stares after Crowky. “We need to do something, Arthur. Go after him!”

“There’s nothing we can do,” I say. The ice floe we’re standing on has shifted and we’re drifting out to sea.

“There’s something I can do,” says Win, eyes blazing. “Magic!” And with that he wriggles out of his onesie and holds it high above his head. Now he’s standing on the ice, in his underpants once again. He takes out his wand.

“Win,” I say. “What are you doing?”

“Only my new best spell ever,” he says, then he points his wand at Crowky and yells, “BOGGLE HISS!”

There’s a bang, a flash of black stars, and suddenly Win’s onesie has vanished from his hand and instead he’s clutching Grandad’s “NO PROB-LLAMA!” T-shirt.

Across the ice we see Crowky stop and spin around. He’s wearing Win’s fur onesie. He pulls it open and stares at his chest. That’s when he realizes the T-shirt has gone.

“The swapping hex,” I say. “Win, you’re brilliant!”

Win laughs with glee, yelling, “Bad luck, Crowky!” Then he waves the T-shirt over his head and, still in his pants, he starts doing a triumphant dance. “Who’s stupid now? You are because you’re wearing a too-tight furry onesie!”

It is too tight. Crowky can barely stand up in it. Clumsily, he struggles out of it.

Meanwhile Win has put on the “NO PROB-LLAMA!” T-shirt and is moonwalking backward across the ice. He points with both fingers at the T-shirt. “Look what I’ve got!” he shouts. “Oooooh yeeeaaaah!”

Crowky starts running back toward us. His wings burst open and he leaps from floe to floe with impossible speed. Win stops dancing. “He can’t reach us, can he?” he says.

Our chunk of ice is still floating out to sea, but Crowky is moving fast.

“I think maybe he can,” I say, just as Crowky makes the final jump. His wings flap and strain, his legs windmill through the air, then he lands in front of us with a crash.

He stays in a crouch. His head is down and his shoulders shake as he tries to get his breathing under control. Then, slowly, he looks up at us. “This is where it ends,” he says, and he leaps forward and rips the T-shirt from Win’s body.

This sends Win toppling backward. His arms reach for me, but Crowky has already grabbed hold of my shoulder. A chill sweeps from his twig fingers and into my body, locking my limbs. All I can do is watch as Win teeters on the edge of the ice before splashing into the sea.