Here is the full list of all 20 Panmorphia achievements.
Finish Panmorphia
Found the amulet.
Shiny!
Transformed back into a human.
Opened a cave.
Who needs Captain Nemo?
Found the Fire element.
Transformed into a fish.
Found the Water element.
..way up high!
Transformed into a bird.
Found the Wind element.
It wasn't me!
Coughed up a hairball.
This grass is dry.
Transformed into a cat.
Found the Earth element.
No love potions here.
Broke a window.
Found some flowers.