Rust-red fur sprouts from your skin, and your back hunches over until you stand on four clawed feet.

Tendrils of black smoke curl from your fanged mouth.

You take the form of a hell hound (MM 151).

You gain 10 temporary hit points, which disappear at the end of the spell's duration.

See the Polymorph Subschool sidebar on page 91 for more details.