Elsa blocked the dagger with her arm. She hissed as black blood seeped out of her skin.

"Elsa!" Anna cried out. Before Anna could say anything, a black ice rose around Elsa. It spiked up, forcing Anna to step away.

"Just leave." Elsa said, heading back into the cave, "I didn't ask for your help."

Elsa disappeared into the darkness of the cave. Jack flew above Anna, "I told you she's better off here." Jack laughed. "Not very good with family are we?"

Frustrated and humiliated, Anna threw sprouted vines around Jack. 

"Wow, you really aren't the smart one." Jack flew away from the vines, and shot out a black ice into the vines. The vines froze under the darkness of Jack's magic, the ice quickly spread, encasing Anna in ice.

He turned to the other girl. "One down, one to go."