Christina
Her eyes widened at the unnatural force coming her way, and desperately shot her hands out at both incoming threats - the gem and the cloud of inky hell. Power visibly surged through her veins, the spaces where her skin was exposed through her armor lighting up. "Damn it, PALISADE!"
A wall of solid metal violently shot up from the platform, reaching just high enough to give Christina some breathing room the shadows couldn't penetrate - the mist's attempts to drain the mana merely halted its advance before it could reach the roof of the crystal sphere, but couldn't destroy the now entirely mundane structure with the same ease as a spell.
"JINN!"
And in her place, a spectral figure of wind and fire took whatever terrible fate the second gem had in store instead of her.
That being said, she formed another platform of solid stone for her feet to make purchase on, and shot herself like a rocket right at her foe with her fist cocked back.
"COMET STRIKE!"