Emrakul- Fuels the spell and controls Tamiyo to bind herself

She sheathed both of her swords behind her back. When her hands came back to the table they were holding a large scroll, a scroll with iron bands. I've seen a scroll like that before. Where? "You do not mind if I work while we talk, do you?" Her lilting voice sounded like it could come straight from an Azorius guildmage wanting guidance on a point of protocol.

***

Her words came out staggered, halting. "Nissa had fallen. The spell was in danger of collapsing. I didn't know what to do, how to help."

Jace was surprised. "So Nissa generated that power by herself? Impressive. I had thought it was you, with the second scroll."

Tamiyo looked at him, sadness and scorn both in her eyes. "No. You don't understand. It was me. With the second scroll. That's where the energy came from."

"But that's wonderful! You saved us! You saved all of Innistrad, all of...everything! Is it because it was one of the iron scrolls? One of the scrolls you didn't want to open?"

"Just shut up, Jace! Listen, just listen. It wasn't me. It...she...took me over. Do you understand? It was not me! I was there, in my own body, helpless as she came in and took over. My eyes, my hands, my voice...she took them all over. They were not mine." Her cries became full sobs.

A voice came back to him, her voice as he had watched his chess pieces stab and kill each other. They are all my pieces, Jace Beleren. They always were. I just no longer want to play.

(The Promised End)