Three Sisters

Once, there were three sisters who came to rest in a forest. The night was cold, and they decided to built a fire.
Only, the three sisters could not agree on how the fire should be built.
The eldest, who had the most melodious voice in the land, thought they should sing a song of summoning to get a salamander to light their fire.
The second sister, who was a student of magic, thought she should use the spell of Ignatius.
The youngest sister, who had spent time learning from the castle servants, suggested they use a bit of flint and steel.
The oldest two sisters laughed at the simplicity of their youngest sister's suggestion, then set to arguing with each other over which idea they would use.
After a little time, they decided to both attempt to light the fire, and whichever method worked first would be deemed the best.
And so the eldest sister began to sing, and voice echoing throughout the forest hauntingly.
Meanwhile, the second sister started to chant, an ominous air surrounding her with each word.
The youngest sister decided to give both if her sisters plenty of space, and so headed farther into the trees collect more wood for the eventual fire.
After some time, the eldest sister's song reached a crescendo right as the second sister shouted out part of her spell.
The ground shook, and a rumbling filled the air.
The wood they had gathered for the fire burst into flame as a dragon dropped down from the sky.
"My, what pretty snacks," the dragon growled as it snatched the two sisters in its claws. Loosing a bout of flame into the air, the dragon beat its wings and vanished back into the night sky.
When the youngest sister returned to their camp with her pile of wood, she knew not the fate of her two sisters.
And when she later returned to the castle, her mother had no choice but to name her the new heir to the throne.