Strength + Dispelling Possession

“Climb!” Elspeth screamed. They struggled over the sharp rocks as the waves roared in their ears and battered against their legs. Elspeth felt the watery hands tugging at her. She shoved Nikka up the slope ahead of her. The girl managed to break free of the water and pulled herself onto the trunk of a dead tree with its roots barely clinging to the slope. Nikka reached down and tried to grab Elspeth.

“Take my hand!” Nikka called. Unexpectedly, the girl’s eyes rolled back in her head and she spoke in a god-voice that was not her own. “I am Thassa, and you are a thief. I claim your blade in the name of the God of the Forge. I claim your life in the name of mine.”

“Fight her!” Elspeth cried to the girl. “You are Nikka. Claimed by no one! Beholden to none but yourself!”

Desperately, Elspeth drove her spear-blade between the roots of the tree and clung to it while the sea tore at her. It felt like she was being stretched on a torture rack. Pain addled her mind as she desperately cast a spell to free Nikka. But the girl wasn’t afflicted by control magic. Thassa was using Nikka as a mouthpiece, not a puppet. Like a hand brushing away cobwebs, Elspeth skillfully swept the magic from the girl’s mind. Nikka’s eyes returned to normal, and she glared angrily at the sea.

Theros: Godsend, Part I, Chapter 10