Maura-trump card

Mora touched her solar plexus. There lay her final trump card, a red jewel that  had been surgically embedded into her body. Mora and the Saint of Fire Lenelle  had combined their powers to make it. And it was her most powerful weapon.

The jewel contained the power of a volcanic eruption. When the sacred words are  incited, the jewel would absorb the enormous power of the magma from within  the ground. And there was no controlling that power. It would simply cause a  gigantic explosion and obliterate both Mora and everything around her.