From within her self-imposed imprisonment, the woman shudders slightly at the sound of the Cofagrigus and Dragonair's song. It's not entirely certain whether or not this is a positive response, but at least, she's not rejecting it outright. There comes a pained inhalation as the flames and the frost surrounding her begin to recede slightly as well - though really, it doesn't amount to a much better situation in the end. She seems to be holding her breath, as if keeping the air from escaping will keep her powers from spiraling out of control as well.

"Hurry..."

And for a moment, it seems like this might possibly go without incident. But as Ami draws closer and closer, Sierra's hands begin to shake.

"Wait - No - Don't..."

She can feel it in the ground. Every step forward sends a tremor, every movement sends a twitch of pain through her mind. That connection she had with the earth would be her downfall.

"S-Stop!"

And with that choked cry, the rock surrounding her suddenly shatters and bursts out in every direction! Ami might be in trouble here, but by a freak stroke of terrible luck, a shard, barely a sliver, shoots out straight towards the eye of a certain Shifter standing awkwardly a ways back.

"No no no no no no no no... no....."

Her body is revealed now for the world to see; her legs are half-buried in the ground, and it is from there that the veins of ice and fire are flowing outwards... Sierra has closed her eyes; every ounce of her being is dedicated now to preventing those veins from expanding even now.