The door flew open, to reveal a creature with a person's head, bird wings, and a lion's body.
"A Sphinx!" Gunhild yelled. "Don't let it grab your throat!"
She slammed the green stone into her forehead, and transformed. She grew taller, her skin grew paler, her pupils became slits, and her red hair became darker. Her coat changed, so it was black leather with green patterns, and her boots gained high heels and wings on the ankles.
She summoned balls of fire into her hands, and flew at the sphinx, whilst yelling "Come at me bro! I've just activated my Loki rune, you overgrown housecat!"
"Here we go again..." Ingrid smiled in a doting manner, and loaded her crossbow.
"We need your help to fight the sphinx! Don't worry, I'm a healer, I can heal you if you get hurt." Ingrid told the other inhabitants of the carriage.