[Welp. Stone could fight that. Probably. If this being a dream means he has the strength, speed, and endurance he remembers, instead of the fragile near-death body he arrived with. Does he want to take the risk, with two groundlings right there likely to get tossed to splinters themselves if he tried?

Nope, not really. Stone is a dramatic old geezer, but he's got some streak of realism in him. So he yells at the two humans:]

Grab onto my legs and tail!

[And before they can (well, currently, he doesn't have a tail...), he disappears, into a cloud of dark mist. That cloud expands, reforms, and solidifies into... well, dragon is probably an apt enough word. Four limbs, wings covered in feather-like scales, a long spaded tail, and a mane of spines all down his head and back. The last is currently flared tall, like an cockateil, a shield of deadly sharp protection along his spine. Also, he's easily as tall as the Invincible standing on two legs, with something like a seventy-foot wingspan.

He lets out a shriek that sounds somewhere between an angry cat, a diving hawk, and a challenging elephant, then rears up off the boat to swat at the approaching claw, while his hind feet start cracking and tearing at the boat simply by being very big and very sharp-clawed.

Now's the time to grab on, boys. He's getting them some breathing room (hopefully), and then he's gonna dive.]