Arad walked to the other room, seeing a humanoid figure of a woman made of crimson flames asleep on a stone bed. "Is this her?" He asked.
"You're right," Merlin replied. "Fire elementals are made of pure fire and heat." She grabbed a steel rod and waved it into Amber's body.
The rod passed as if nothing was there. She's really only made of flames. "But look," When she passed the rod inside Amber's chest. CLACK! CLACK! As if it hit a stone.
"The infernal spark is where her heart should be. It's the source of her power and the only weak point a fire elemental has. Destroying it means she dies unless she can find another source of fuel." Merlin explained.
Zephyr flew and sat on Arad's head, "If the infernal spark was destroyed, she could survive off burning wood or anything that can. But, the spark is the only thing that can sustain and elemental for a long time."